catted DP or cattless DP?

[black-speed3-gt]

whats better a catted DP or a cattless DP and are there any problems i will incounter with having a cattless DP??? like over boosting and check engine lights???

[08_ms3_gt]

Originally Posted by black-speed3-gt whats better a catted DP or a cattless DP and are there any problems i will incounter with having a cattless DP??? like over boosting and check engine lights???

you run the risk of both overboost and CEL's with a catless DP. catted DP's have the same risks but less so.

i can't think of many reasons why a catless DP is better, besides a slight cost decrease. the pressure drop across a high-flow cat is not significantly greater than straight pipe.

if you want to keep the emissions safe-ish, add a little protection against CEL's and overboost, and avoid giving headaches to driver's behind you (fumes..), get a catted DP.