I just installed the y-pipe this past weekend and notice a good gain through out the RPM. Now I'm wondering how restrictive is the SVT cat??? (I've got the MSDS Y)
Will replacing the stock SVT cat with a high-flow cat make a big difference?
Can you guys recommend a good high flow cat.
I've heard of CATCO, MagnaFlow, FlowMaster, Dynomax... are these any good?
Eventually, I plan to put on the Borla cat-back to complete my exhuast mod.
