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      12-11-2012, 01:22 AM   #17

Drives: '08 E90 335i
Join Date: Jan 2012
Location: Northern NJ

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2008 BMW 335i  [3.75]
Originally Posted by 335ixdrive2009 View Post
What problems could the Catless dps cause?
I have to take them out for every warranty service right?
Could they cause excessive damage on a long road trip? 1k miles non stop?
Thank you guys so much for your time and patience. I just want to protect my car and use the warranty to my advantage while increasing sound and hp
Catless DPs won't cause any problems on their own. I've had my catless DPs in for a while & leave them in for service, but that's also a benefit of going to a mod friendly dealer (check your regional forum & ask around about which dealers are cool & which ones to stay away from).

There is no damage they can cause, I've driven 300 round trips multiple times (caravans to Bimmerfest East & MPact) with my most aggressive tune setting, catless DPs and an aftermarket intercooler and had NO problems. Honestly, if you mod your car responsibly & regular maintenance (oil changes, spark plugs, 93 octane consistently, let the oil temp warm up before ripping on the car, etc), it'll be fine.