down pipes

[isthatfuny]

has anyone made or tried out a full 3" down pipe with or without the cat, that bottleneck on the factory pipe has to be taking some power away? anyone anyone?? thrift(tommy) got anything for us?

[tthrift]

i have a full 3" system from the turbo to my btg tail pipe, it sounds louder than the btg cat back syytem with resonator i had on there. i like the sound and there is deffently a power gain with the 3" pipe.

you are right the bottle neck is a power robber get rid of the bottle neck.

i still have the cat on the car, but i also have a race pipe and when i get some time i am going to re[place the cat with the race pipe and see if i get more power. i have been told that if i replace the cat with the race pipe and keep the second 02 sensor in the pipe i won't through a cel or code, but if you remove the 02 senser it will through a cel.

i hope to have some more info soon. i am still working with hector on a 3" downpipe to the tail pipe with no bottle neck.

tommy

[Exhaust Depot]

Also, the muffler is a power robber. Its not a straight through design which is what you want for a turbo car.