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Description
Header Gaskets-Alum-Layered-262-400 Chevrolet SmallBlock Gen I 1955-91 99150FLTOverview: FLOWTECH REAL SEAL header and collector gaskets are a revolutionary break through in exhaust sealing technology. Constructed of separate layers of "Dead Soft" aluminum, REAL SEALS provide a do it once solution that will not burn or blow out. REAL SEAL gaskets will work when an o ringed gasket will not because the "Dead Soft" aluminum conforms to create a leak proof seal. REAL SEALS can also be easily trimmed for port matching and you can use
Overview:
FLOWTECH REAL-SEAL header and collector gaskets are a revolutionary break-through in exhaust sealing technology. Constructed of separate layers
of "Dead Soft" aluminum, REAL SEALS provide a do-it-once solution that will not burn or blow out. REAL-SEAL gaskets will work when an o-ringed
gasket will not because the "Dead Soft" aluminum conforms to create a leak-proof seal. REAL-SEALS can also be easily trimmed for port-matching and
you can use them over and over again.
Features:
- Multi-Layer "Dead Soft" aluminum conforms to create a leak-proof seal
- Water/Weather Resistant
- Re-Useable
- Will Not Burn Or Blow Out
- Suitable For Port-Matching
- Made In USA
Application:
- 1955-1986 Chevrolet Corvette
- 1959-1986 Pontiac Parisienne
- 1959-1986 Chevrolet El Camino
- 1958-1985 Chevrolet Impala
- 1955-1981 Pontiac Laurentian
- 1955-1981 Chevrolet Bel Air
- 1966-1986 Chevrolet Caprice
- 1967-1986 Chevrolet K10 Suburban
- 1967-1986 Chevrolet K20 Suburban
- 1967-1986 Chevrolet C20 Suburban
- 1967-1986 Chevrolet Camaro
- 1967-1986 Chevrolet C10 Suburban
- 1964-1983 Chevrolet Malibu
- 1968-1986 Pontiac Firebird
- 1970-1986 GMC Jimmy
- 1970-1986 Chevrolet Monte Carlo
- 1971-1986 Pontiac Bonneville
- 1960-1974 Chevrolet K20 Pickup
- 1958-1972 Chevrolet Brookwood
- 1960-1974 Chevrolet C10 Pickup
- 1960-1974 Chevrolet K10 Pickup
- 1958-1972 Chevrolet Biscayne
- 1960-1974 Chevrolet C30 Pickup
- 1960-1974 Chevrolet C20 Pickup
- 1968-1981 Pontiac LeMans
- 1959-1972 Chevrolet Kingswood
- 1958-1970 Pontiac Strato-Chief
- 1970-1981 Pontiac Catalina
- 1975-1986 Chevrolet K20
- 1975-1986 Chevrolet C20
- 1975-1986 Chevrolet C30
- 1975-1986 Chevrolet K10
- 1975-1986 Pontiac Grand Prix
- 1975-1986 Chevrolet C10
- 1975-1986 Chevrolet G10
- 1975-1986 Chevrolet G20
- 1975-1986 Chevrolet G30
- 1975-1986 Chevrolet K5 Blazer
- 1969-1979 Chevrolet Nova
- 1964-1973 Chevrolet Chevelle
- 1977-1986 Chevrolet K30
- 1977-1986 Buick Regal
- 1978-1986 Oldsmobile Cutlass
- 1978-1986 Oldsmobile Cutlass Supreme
- 1978-1986 GMC Caballero
- 1975-1983 Pontiac Grand LeMans
- 1975-1982 Oldsmobile Delta 88
- 1967-1974 GMC K15/K1500 Suburban
- 1967-1974 GMC K25/K2500 Pickup
- 1967-1974 GMC K25/K2500 Suburban
- 1967-1974 GMC C15/C1500 Pickup
- 1967-1974 GMC C15/C1500 Suburban
- 1967-1974 GMC C25/C2500 Pickup
- 1964-1971 Pontiac Acadian
- 1979-1986 GMC K2500
- 1979-1986 GMC K2500 Suburban
- 1979-1986 GMC K3500
- 1979-1986 GMC C1500 Suburban
- 1979-1986 GMC C2500
- 1979-1986 GMC C2500 Suburban
- 1979-1986 GMC C3500
- 1967-1974 GMC G15/G1500 Van
- 1967-1974 GMC G25/G2500 Van
- 1967-1974 GMC K15/K1500 Pickup
- 1967-1974 GMC C25/C2500 Suburban
- 1973-1980 Pontiac Grand Am
- 1979-1986 GMC K1500 Suburban
- 1967-1974 Chevrolet G20 Van
- 1979-1986 GMC C1500
- 1967-1974 GMC C35/C3500 Pickup
- 1979-1986 GMC G1500
- 1979-1986 GMC G2500
- 1979-1986 GMC G3500
- 1979-1986 GMC K1500
- 1971-1977 GMC Sprint
- 1978-1984 Oldsmobile Cutlass Calais
- 1968-1974 GMC K35/K3500 Pickup
- 1955-1961 Chevrolet Nomad
- 1960-1966 Chevrolet Suburban
- 1960-1966 GMC 3000
- 1960-1966 GMC 3500
- 1971-1977 Pontiac Ventura
- 1968-1974 Chevrolet G10 Van
- 1968-1974 Chevrolet K30 Pickup
- 1963-1968 Chevrolet Chevy II
- 1960-1965 GMC Suburban
- 1955-1960 GMC Truck
- 1955-1960 Chevrolet Truck
- 1969-1974 Chevrolet Blazer
- 1964-1969 Pontiac Beaumont
- 1955-1959 GMC 150
- 1955-1959 GMC 250
- 1955-1959 GMC 300
- 1955-1959 GMC 350-8
- 1955-1959 GMC 370
- 1955-1959 GMC F350
- 1955-1959 GMC F370
- 1955-1959 GMC FM340
- 1955-1959 GMC FM350
- 1955-1959 GMC M300
- 1970-1974 GMC G35/G3500 Van
- 1955-1959 GMC PM150
- 1955-1959 GMC PM250
- 1955-1959 GMC S300
- 1955-1959 GMC S370
- 1955-1959 GMC 100
- 1977-1981 Buick Century
- 1970-1974 Chevrolet G30 Van
- 1975-1979 Chevrolet Monza
- 1978-1982 Buick LeSabre
- 1980-1983 Oldsmobile Cutlass Cruiser
- 1955-1958 Pontiac Pathfinder
- 1955-1958 Chevrolet Sedan Delivery
- 1969-1972 Chevrolet Townsman
- 1960-1963 GMC 1000 Series
- 1960-1963 GMC 1500 Series
- 1960-1963 GMC 2500 Series
- 1975-1978 GMC K25
- 1975-1978 GMC K25 Suburban
- 1975-1978 GMC C25
- 1975-1978 GMC C25 Suburban
- 1975-1978 GMC C35
- 1956-1959 GMC PM151
- 1956-1959 GMC PM251
- 1972-1975 Pontiac Grandville
- 1973-1976 Chevrolet Laguna
- 1971-1974 Pontiac Grand Safari
- 1975-1978 GMC C15
- 1975-1978 GMC C15 Suburban
- 1975-1978 GMC G15
- 1975-1978 GMC G25
- 1975-1978 GMC G35
- 1975-1978 GMC K15
- 1975-1978 GMC K15 Suburban
- 1968-1970 Pontiac Tempest
- 1975-1977 Oldsmobile Custom Cruiser
- 1978-1980 Oldsmobile Cutlass Salon
- 1977-1979 Oldsmobile Omega
- 1977-1979 Oldsmobile Starfire
- 1955-1957 Chevrolet One-Fifty Series
- 1955-1957 Chevrolet Two-Ten Series
- 1977-1979 Pontiac Phoenix
- 1957-1959 GMC PM152
- 1957-1959 GMC PM153
- 1977-1979 Buick Skylark
- 1959-1961 Chevrolet Parkwood
- 1969-1970 Chevrolet Estate
- 1957-1958 Chevrolet Del Ray
- 1955-1956 GMC M340
- 1977-1978 GMC K35
- 1978-1979 Pontiac Sunbird
- 1955 GMC 150-22
- 1955 GMC 250-22
- 1955 GMC 280-22
- 1958 GMC PM252
- 1958 GMC PM253
- 1967 Chevrolet K20 Panel
- 1955 GMC 100-22
- 1958 Chevrolet Yeoman
- 1959 Chevrolet 3B
- 1959 Chevrolet 3C
- 1959 Chevrolet 3D
- 1959 Chevrolet 3E
- 1959 Chevrolet 3F
- 1959 Chevrolet 3G
Specs:
| Brand | Flowtech |
|---|---|
| Collector Gaskets Included | No |
| Emission Code | 5 |
| Engine | Chevrolet Small Block Gen I |
| Gasket Line | MLS |
| Material | Aluminum |
| Port Shape | Round |
| Port Size | 1.63" |
| Product Type | Header Gaskets |
| Thickness | .125" |
| Type of Component | Exhaust Gaskets |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Great receiver for money!
Style: 7.2 Receiver
I got this to replace my lackluster Onkyo TX-NR6050 I purchased from Costco. Three areas stand out for me with the Yamaha receiver:
1: Audio, movies sound great, dialogue is clear. Action scenes are impactful and dynamic.
2: Picture quality, bright, vibrant and beautiful colors from my PC and from my Firestick.
3: Ease of use, out of the box ready to go. Menu is dated (no gui really just an overlay, which is fine by me). Renaming inputs, adjusting speaker settings and setting EQ preferences super easy. Took about 20-25 minutes to fully setup. In those 20-25 minutes I was already way ahead of the Onkyo.
Great value for the price! Volume is very easy to set!
Still have to test PS5 performance, Bluetooth connectivity, USB settings, WiFi and a few other items. I’ll probably end up buying a Blu-ray player since this was so easy to setup! Or maybe use my PS5/Xbox One :)
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Reviewed in the United States on October 15, 2025
★★★★★ 5
Solid 2 Zone Receiver / Amplifier - Excellent video and Audio
Style: 7.2 Receiver
I purchased this Yamaha to replace the 10YO previous version that no longer decoded SiriusXM. This new clean front panel design and much improved remote control are easy to use once installed. I have to say the only complexity I have run into is connecting 3 smart devices together - NVIDIA Shield PRO Streaming Box, RX V6A Receiver and LG OLED TV via HDMI chain from Streaming to Receiver to TV with no audio or video passing through the TV first. The only issues that result is getting all 3 to play nicely when switching on and off via a single (NVIDIA) remote control. It is nothing short of fantastic to be able to have such a simple remote control all three devices for the most common functions. Only specialty settings require a specific remote. However it becomes an issue of chicken or egg - as control messages to go on or off are carried by HDMI and the power sequence becomes complex - with options to turn on or off IF ... THEN... for all 3!
Otherwise the receiver has been a dream to finally restore sound to several rooms in our home from SIriusXM and now several other sources as well, I'm thrilled with the features, new MusiCast control and ease of operation once installed and properly paired for single remote operation. I plan to have this around another 10 years and enjoye the excellent 4K video upscaled by the NVIDIA device and handled beautifully by the receiver to drive the TV in rich color and great 5 Channel Sound.
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Reviewed in the United States on December 25, 2023
★★★★★ 4
A great A/V receiver at a great price. Too bad Amazon Customer support is horrible.
Style: 7.2 Receiver, Style: 7.2 Receiver
Pros,
1. A 7.2 channel A/V receiver that can do 5.1.2 Atmos. It also support DTS-X as well.
2. 200 watts total power. Don't let that fool you. It powers my 5.1.2 speaker setup far better than my previous Onkyo TX-NR5100 that's supposed to 80 watts per channel. Also sounds a lot better and clearer.
3. 7 HMDI inputs and 1 HDMI eARC output that support 8k/60hz and 4k/120hz with Dolby Vision. Additional speaker inputs for extra zones for run into other room.
4. Uses banana plugs for easy installation.
5. Has both WIFI and Bluetooth. Also includes an AM/FM antenna as well as a speaker calibration mic.
6. Has two RCA subwoofer input jacks for dual sub units.
7. Very well built and very sturdy unit. Looks very nice.
8. Includes an extremely nice remove control.
Cons,
1. It's not the easiest to setup nor the most user friendly. Once setup you should be good, but it's a matter of the learning curves.
2. Make sure you get the latest firmware. You may get unlucky, get an older unit, wonder where all the features are at and why they're not available.
3. Lastly Amazon customer support is utterly horrible and useless. I order this produce and later that day they offered a discount. I called up customer support for a price match and THEY REFUSED TO DO IT!!!! I ended up canceling the order and reordering at the better price and Amazon ended up losing money because they were getting ready to ship the first order. LEARN TO PRICE MATCH LIKE YOUR COMPETITION!!!!!!!!
I have this hooked up to my computer for movies and gaming, it works great because of the 120hz pass through. Other than horrible customer support the receiver is great and otherwise I'd have rated it a 5 star. I took one star for the customer support.
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Reviewed in the United States on May 11, 2025
★★★★★ 5
Review
Style: 7.2 Receiver
So far I’ve been very pleased with the unit although I only use it for powering two large front 4 ohm external speakers while listening to music streaming on apps in the TV. Unlike AVs from both Denon (who I believe has the best tech support) and Onkyo that I returned, when I turn on my Sony Bravia TV with settings enabled for eARC, the Yamaha unit does not automatically turn on and subsequently switch sound to the external speakers. Perhaps it’s possible but it’s not something that I wanted. Additionally, I came to learn that both Denon and Onkyo are owned by the same parent company, which may explain their common behavior. However, the Yamaha receiver does automatically switch to the external speakers when I power it on and I am able to control the AVR volume with my TV remote control. Additionally, with the settings I have on the TV and AVR, when I turn off the AVR, the sound automatically switches back to coming from the TV speakers, and the TV does remain on. Again, something I want to happen. In general, I’ve found that these devices are very complicated with their myriad number of settings on both the TV and the AVR, and it can be very challenging to properly set them. I’m retired now but my undergraduate degree is in electrical engineering from an Ivy League school at a time when we used slide rules to do the mathematics. I would say that it’s not easy to learn how to use the devices with eARC. If you only want to improve the TV sound, I'm guessing that's it's a lot simpler to use a sound bar. In my case, I've had large and expensive 4 ohm front speakers that I wanted to continue to use (my old AVR does not have any HDMI connections) so a sound bar was not an option for me.
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Reviewed in the United States on March 14, 2024
★★★★★ 1
Sound is fine thus far, but the rest is an exercise in irritation
Style: 7.2 Receiver
I selected this receiver based on spec sheet comparison to other receivers in its general class and price point, as well as reading through ‘professional’ reviews and assessments of various levels of dubiousness. The general specs as far as features and performance were the biggest factor. But there are things that can’t be discovered in ad copy and that are frequently omitted from even the most genuine and considered review.
tl;dr: This is a device with an incredible range of functionality that is hidden from the end user by poor documentation practices, and irritating design choices that bury critical menus under unstated tech dependencies. You must have an Android/iPhone capable of running their apps, and a display connected via a video out to get good output from anything but the headphone jack.
Thus far the sound output has proven quite satisfactory. It is these other factors that are dragging the rating into the proverbial pit.
The display is a bit cheap, and the backlighting across the panel tends to wash things out about half as much as it illuminates. It’s very old tech—but forgivable if the result is better components elsewhere. Still, the display on my mini battery powered air inflator is a crisp full color OLED, so I have my doubts that that is the case here.
The biggest problem is the lack of a physical manual. There’s something of a quickstart guide, but when you consider that most of the controls are via the remote and hidden in menu systems and that those menus have a certain opacity to them, it’s not enough information by long shot, especially if you’re not an experiential learner who strongly prefers to dive into the action and see what happens. If you prefer a more studious approach where you don’t even touch a button until you have some idea what it might do, this is going to be more challenging.
There are digital manuals. You can get access to the manual via the Yamaha website, or by downloading via an app that exists to serve up Yamaha manuals. This dependence on screens for vital information is grotesque and should be considered unacceptable. There are multiple problems with this approach.
One is the assumption the end user is going to have a suitable phone and be comfortable downloading an app and having a manual on a poor screen for reading technical information and diagrams on. I’m also averse to the idea of my manual requiring adequate battery power, and the only touch navigation I find acceptable in a manual is turning a page; for clarity, I mean physically moving a paper page, not tapping or swiping. Call me old fashioned, call me old, but I’ve had failures in these things before. I’ve never had a book fail to work without it being destroyed.
Another issue is longevity. I’ve had too many devices outlive the availability of their digital documentation to be on board with that being the only way it is available.
An app is also a requirement to get access to bluetooth as an input. Or at least, that is the only way I was able to get it to work, and then only because I decided to see if the “Musiccast” thing was going to get me access to bluetooth. If there is another way, it wasn’t documented, not that the way I found was particularly well documented. There was nothing saying that that was how to get access to bluetooth as an input, only a short sentence saying you had to set the input to bluetooth for it to receive audio over bluetooth—but cycling through inputs via the remote or the dial on the front never reached a bluetooth input until I had set up Musiccast.
Musiccast requires a phone with a working wifi radio to connect to it.
Once again, this dependence on an app on a phone, and presumption the end user will both have one and be willing to link it up this way is an obscenity. But it’s made worse by having basic labeled functionality hidden behind it, and poorly documented at that.
There are at least two separate menu systems, and two means of accessing them. It is possible to access them from the front panel, using a dial, but the interface is incredibly cramped on a tiny display with bad contrast and worse use of space. The other method is using the remote to trigger an overlay on video out, assuming you are using the HDMI out of the receiver to connect to a display. Ultimately, this is required to have full access to to all the settings. The menu on the unit itself is absolutely tiny in what it can do compared to the full functionality of the unit.
For example, it is required you access the on screen menu to select which speakers are in use, what kind they are, and whether or not you are wired for Bi-Amp. If you don't set these settings and your setup doesn't match the default setup, you're going to have issues. The app doesn't cover all of this, and for a device that places such heavy emphasis on it's ability to play music, it is very annoying to have to have a display hooked up to have access to critical setup functions--granted, they really want you to buy into their Musiccast eco-system, so much so that the app is only suitable for setting up Musiccast branded speakers.
I don't object to having to set things up. While it would be nice if the unit could sense whether or not an output was connected, I realize that with some of those outputs, knowing it is connected isn't sufficient as they might be put to several uses--still, that could be handled with a switch or a system menu on the device itself.
There are a few buttons on the front of the receiver, but all but the power button are capacitive buttons, marked in faint white print with poor contrast. I only discovered them when peering at what I had thought was a blank face looking for the “Connect” button called out in the manual to get Musiccast working. These are terrible buttons, and it’s clear the engineers knew it when they made the power button physical.
Internet Radio was apparently also locked behind the Musiccast app connection as it didn’t show up as an input until I connected the Musiccast app—again, not documented beyond saying you had to set the input to Internet Radio to use it.
Another irritating grievance hidden in menus only accessibly by poking around the on-screen menu, only accessible if you have a display hooked up: Eco mode. In its default state, this will partially shut down after 20 minutes of not processing sound. If hooked up to a display, this will then go to a pass-thru mode, and it will not automatically pick back up again once audio signal is again being sent.
For example, you have a console or PC hooked up to HDMI in, and the display hooked up to HDMI out/eArc. If you are using those devices in a video only mode, with no audio signal, whether it's because you paused a game, or simply got lost reading something and the music stopped, after 20 minutes, the audio processing will shut down, there will be a bit of a flicker and a snap as internal routings are switched around, and the unit will no longer output sound. All sound will iinstead be sent to the display as if the receiver didn't exist. This will persist even if you do start sending audio again. It will not turn itself back on even if you swap inputs, though other inputs will work as normal. The only way I've found to get it out of pass-through for that input is power cycling either the receiver or the sending unit.
Fortunately this can be changed, unfortunately, you absolutely have to have a display hooked up to access the menus to do so.
Overall, the user experience has been underwhelming at best with poor documentation where it exists, an absence of physical documentation, and some terrible choices in terms app dependency. I absolutely hate that I have to use my phone to get access to not just full function but a basic function like being able to pair a bluetooth source to the receiver for playback.
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Reviewed in the United States on May 15, 2025
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