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Discussion Starter · #1 ·
Depo Racing Focus ST Downpipe Testpipe . In stock cars, the stock catalytic converter is the primary choking point to make power with a turbo. In order for the turbo to spool fast and compress the air for the engine, the exhaust needs to escape freely. If the exhaust stops flowing the turbo stops moving efficiently.

a. 3″ 304 Stainless Steel

b. Support brace

c. good for 700+ whp

e. Bolts up to stock or aftermarket exhaust

– See more at: Depo Racing

Hi Flow Cat is 100 cell free flowing
 

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Discussion Starter · #10 ·
you have to have it disables with a tuner or extend the o2 bung so you dont throw a cel. I passed a NY inspection with no cat 3"straight pipes, no CEL you pass
 
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