Features
- Deep, Aggressive Tone: The Flowmaster 80 Series Cross-Flow muffler offers a very aggressive tone that offers a deep, powerful sound. It will sound great inside or outside the vehicle and it's guaranteed to turn heads.
- Cross Mounted Design: The 80 Series muffler is designed for vehicles where ground clearance issues exit. It mounts behind the rear axle crossways. Several styles and sizes are available for almost any application.
- Performance Muffler: The Flowmaster 80 Series muffler offers unrestricted exhaust flow for increased performance. The baffled chamber ensures a clear flow path for more horsepower and torque.
- Aluminized Steel: The Flowmaster 80 Series Cross-Flow muffler is constructed of heavy duty 16 gauge aluminized steel.
Description
The Flowmaster 80 Series Cross-Flow mufflers were designed for vehicle applications where the muffler must be mounted transversely behind the rear suspension. This dual-chamber muffler is ideal for sports cars such as the Camaro, Firebird, and others with ground clearance issues. The 80 Series Cross Flow muffler offers a very aggressive tone that will give your car a performance tone inside and out. This Flowmaster muffler will sound great on late model and vintage muscle cars with or without catalytic converters. It is available with single or dual inlets and outlets and is designed for 2.5" or 3" exhaust systems. The Flowmaster 80 Series muffler is constructed of 16 gauge aluminized steel for long life and lasting durability.
Frequently Asked Questions
What is Flowmaster's warranty?
All Flowmaster products built of aluminized steel have a 10 year limited warranty against defective materials and workmanship. All stainless steel mufflers have a 10 year limited warranty against defective materials and workmanship.
What is "Delta Flow" technology?
Flowmaster's "Delta Flow" technology has evolved from extensive Research & Development at race-tracks around the country. This new technology provides superior scavenging while reducing resonance inside the vehicle. What you can expect is improved performance while maintaining a pleasant tone, both inside and outside the vehicle.
What materials are used to build Flowmaster mufflers?
All Flowmaster products are fully mig welded and built from 16 gauge aluminized steel for durability and value. Specific part numbers of the 40 and 50 series are also offered in 409 stainless steel, while the Hushpower II mufflers are offered in either 409 stainless steel, or 304 stainless steel.
What pipe size should I use for a street application?
In general, the following guidelines should be applied for street applications.
2" tubing up to 100 hp per pipe
2.25" tubing up to 160 hp per pipe
2.5" tubing up to 200 hp per pipe
3" tubing up to 300 hp per pipe
Do I need to install an "H" pipe to my dual exhaust?
Flowmaster strongly recommends using an "H" pipe, commonly known as a "balance tube" on all "true dual" exhaust systems. An "H" pipe equalizes the pressures between both banks of the engine giving a broader and flatter torque curve throughout the rpm range. It also eliminates "back-rap" common on deceleration, and creates a deeper mellower tone both inside and outside of the vehicle.
Is an "X" pipe better than and "H" pipe?
Over the years, Flowmaster's testing of all types of crossovers, including "X pipes", has revealed no substantial benefits over a properly installed "H" pipe on street driven applications. However, in race applications with small cubic inch engines and /or restricted (small bore) carburetors, will respond well to the addition of X pipes, tri-y styled collectors and/or properly designed single exhaust systems.
Will my late model vehicle run better if I replace the single inlet muffler with a true dual exhaust system?
Flowmaster does not recommend replacing factory single inlet exhaust systems with a "true dual" system on computer controlled vehicles. The computers in most late model vehicles will not be able to compensate with the fuel needed with an almost doubling of the exhaust flow. Flowmasters dual outlet kits will give you the look of a "true dual" system, while optimizing the vehicles performance.
Do I need to run tailpipes after the mufflers?
Yes, Flowmaster highly recommends running tailpipes out from under the vehicle. This directs the exhaust fumes away from the vehicle, while minimizing the sound transmitted into the cab area of the vehicle.
What kind of performance gains can I expect when installing Flowmasters on my vehicle?
Performance gains will vary dependent upon your application. The more power the vehicle makes, the bigger the gains will be. Generally, a 5-7% gain of power is fairly typical, while 1-2 mpg can be achieved. That is if you can keep your foot out of the gas to hear that Flowmaster sound.
How can I be sure that I'm buying a Flowmaster muffler?
The Flowmaster name is embossed in every muffler case that Flowmaster builds. If it doesn't say Flowmaster on the case, it's not a real Flowmaster muffler.
