Dodge Diplomat 1985, Seal-4-Good™ Exhaust Header Gaskets by Percy's High Performance®. The Percy's Seal-4-Good Reusable Flange Gaskets are multi-layered and made from a special "Dead Soft" Aluminum, which conforms to header flanges for the ultimate seal. Since the Seal-4-Good is made from multiple layers of dead soft metal, it easily conforms to small imperfections that a copper gasket simply can not. Due to this construction, these gaskets will not blow out or burn out when properly installed. Don’t put up with that ominous, unmistakable “tick, tick, tick” sound of an exhaust manifold leak. If it isn’t leaking air into the manifold and turning on the check engine light, then it’s letting out hot exhaust gases, which can eat up cylinder heads and manifold flanges like a blowtorch.
|Port Size: 1.625" x 1.0"|
|Inlet Port Shape: Rectangle|
- Multi-layered for excellent conformability and seal
- Seals even imperfect flanges
- Reusable gasket is a racer’s dream when you’re changing headers at the track
- Prevents O2 sensor false lean readings
- Prevents blowout and torched headers
- Made in U.S.A.
Pure metal gaskets seal to the irregular surface of the head and manifold flange by simply bending and conforming. The soft sheet metal layers are thin enough to fill any gaps, preventing exhaust gases from exiting, and torching a hole on their way out. Even minor leaks, which actually leak outside air into the manifold (and causing the O2 sensor to read lean, turning on the CHECK ENGINE light) are sealed without having to use any goopy gasket sealers. These gaskets seal poorly-fitting flanges so well they’re reusable multiple times.
Percy High Performance® was founded by racers to deliver quality, affordable, and innovative products for racers. From a wide array of gaskets to wheel and tire fitment tools, tire pressure equalizers, temperature indicators, gas temperature probes, jet extensions, bung and plug kits, and more, Percy’s develops unique, problem-solving products for the racing and high performance automotive aftermarket. Percy’s is a proud “Made in the USA” manufacturer that vows to satisfy all customer questions or concerns. Make Percy’s a part of your racing repertoire, then get used to parking in Victory Lane!