Custom 3 in. exhaust

[oncogene1]

Any of have a shop build your cat back system? If so have you seen good performance gains from it. Will the cat back alone give me good gains. Thanks.

[FORZDA 1]

Any of have a shop build your cat back system? If so have you seen good performance gains from it. Will the cat back alone give me good gains. Thanks.

A cat-back will not give "good" gains in actual performance. Sound is all you'll get. Those that claim otherwise, I believe, are feeling the placebo.