Hey guys,

I ran a search but found nothing on test pipes and emissions. I was wondering if anyone in our area is running on test pipes (Helix, Stillen, Pro-1 etc) and how IF at all they are passing emissions legitimately!! I have a friend w/ a WRX STI who eliminated his cats all together b/c turbo car's need as much free air as they can get according to him. But any N/A guys got test pipes and recommendations on brands?? I was going to be in the market for an exhaust upgrade come spring, but just wanted to know in advance how I am to pass emissions, I am assuming you cant...?? Hi Flo cats instead??

Thanks guys!!

 

Test pipes dont filter out any emissions at all.. and thus if you remove Cat's your gonna run into a problem passing emissions. I would recomend Hiflow cats.. probibly Random technology's offering. Ive heard a few guys run them here and have not had any complaints.

 

Thanks mike I knew they basically just passed along all exhaust gases (no filtration) but I was curious as to what all these turbo and/or N/A guys do w/ test pipes!! I'm just going to stick to hi flo cats then!!

 

If I were running test pipes... the day before emmisions was due, I'd slap my cats back on.. test it.. then slap the test pipes back on 'er...

 

my R/T high flow cats passed the emission last month. Actually, all of my mods passed the emission.

 

cars that are 96 and up as long as the check engine light is not on and the exhaust isnt leaking the car WILL pass emissions. my friends g passed maryland inspection w/vortech, test pipes, and borla.