Wich cat for a 01 A4 3.8l?

[01PewterDropTop]

looking at fullthrottle they have 4 different ones? with air, without air, and 1 or 2 O2 Boss?

[Tom Rs]

Re: Wich cat for a 01 A4 3.8l?

get a carsound w/o the air and weld in your own o2 bung. thats what i did

[caspernicus]

Re: Wich cat for a 01 A4 3.8l?

You want one w/o air and w/o o2 bungs.

Magnaflow 94109 is a 3"in/3"out converter. Its the one I used and can be
had on ebay for around $50.

Our rear o2 sensor is in the S-pipe, not the cat.

[Tech]

Re: Wich cat for a 01 A4 3.8l?

A bobcat, they are badass and will protect you!

[01PewterDropTop]

Re: Wich cat for a 01 A4 3.8l?

A bobcat, they are badass and will protect you!

it might mess up my interior tho.