Custom Exhaust Systems - Exhausted. Build Your Own Professional-Looking System. HOT ROD Staff Writer Oct 01, 2010. See All 25 Photos. It doesn't seem like it was all that long ago when you could ...

When building an exhaust system there are some rough guidelines for pipe diameter. In most cases a 2-inch dual system is good for up to 275 hp, a twin 2 1/4-inch system will handle up to 375 hp ...

But the Roush Active Exhaust app adds a new wrinkle to the operation, letting users set up custom, infinitely variable operating parameters to fine tune both the timing and degree of the exhaust ...

Check out these cool tricks for getting rid of hot air with custom exhaust pipes! Details inside 4Wheel & Off-Road Magazine.