How to Design a Custom Exhaust System
For customers who are considering designing a custom exhaust system
for their vehicle, we have listed some of the basic things to keep in mind when designing a true dual system. Most of these points can also be applied to a single system.
The size of pipe used in an exhaust system is a critical item to consider. Pipe diameter will affect the sound level and performance characteristics of the muffler, but keep in mind that bigger is not always better. Too large of a pipe can actually hinder exhaust scavenging by allowing atmospheric pressure up the pipe.
Balance Pipe(H-pipes and X-pipes):
strongly recommends using a crossover
tube, otherwise known as an “H” pipe or balance pipe
on all true dual exhaust systems
. The crossover pipe
equalizes the exhaust pulses and allows the sounds waves to communicate between both banks of the engine. Not only does this usually improve torque in the low to mid rpm range, it also creates a deeper mellower tone both inside and outside of the vehicle and helps eliminate “back-rap” on deceleration.
has performed extensive testing and determined that the “H” and “X” pipes
deliver no significant difference in performance, but do affect tone, the “X” pipe
giving off a higher pitched tone. Flowmaster Scavenger “X” pipes
however, do increase torque through use of their patented D-Port technology and retain the deep Flowmaster muffler
tone desired by most performance enthusiasts.
The sound of your exhaust is much like music; we all have different preferences so it’s important that the system be “tuned” to what you like. With the Flowmaster family of products
we can help accomplish this by answering the questions below. This approach will allow you to choose the best product to suit your needs and expectations.
1. What is the vehicle year, make, and model?
2. Which engine do you have or how much horsepower does it produce?
3. What is the vehicle used for? (i.e.: daily driver, race, towing etc.)
4. Preferred sound levels (interior and exterior?)
5. How are the space requirements?
6. Would you like a complete exhaust system or universal pipe kit if available? Single or dual outlet?
Header Collector Ball Flange Kits:
The Flowmaster Ball Flange Kit
takes the place of messy three bolt flange type connections and allows for a leak free and gasket free ball flange type connection. All kits are 16ga aluminized tubing
and are sold in pairs.
Adequate hangers should be used to properly support the system. Flowmaster
uses OE style hangers in all systems.
are designed to be used in conjunction with your mufflers
for improved sound reduction. Resonators
will help to eliminate interior resonance.
Stainless Tips/ Exit Location:
highly recommends running a minimum of 12” tailpipe after the muffler
. This will not only greatly help in sound control, it will also provide an increase in exhaust efficiency (more power). Running tailpipes out from under the car in street applications will also direct the potentially harmful exhaust
fumes away from the vehicle, as well as minimize the sound transmitted into the cab area of the vehicle.
Flowmaster's line of Stainless Steel Exhaust Tips
are a great way to let people know that you have Flowmasters
under your ride! They come in a variety of styles from brushed to polished and will greatly enhance the look of your vehicle!
If you have further questions regarding any of our products, please call (707) 544-4761 or visit our website, www.flowmastermufflers.com