Ok i've been running my testpipe for about a month now. I recently noticed my bumper getting black, from i guess black smoke? Is this happening happening to you guys? Is running rich, burning oil, or is just no cat? I only noticed it after the testpipe went in so im guessing no cat, but just want to make sure.
Thanks in advance.

 

yes..running a test pipe will do this............my car is white, so my rear bumper has been turning a shade of brown aka championchip white! LOL....but seriously, get a clay bar and rub it down...it will be like new again..

 

ok thats cool then. Yeah, my car is white too and it looks dirty. lol. Thanks for the advise too.

 

my car is already black, but it makes it kinda hazy.

 

i have a black teg and running a test pipe..ni problems for me...aha wonder y? lol

 

i rebuilt my motor recently and i "spruced" up my stock exhaust, repainted the canister black, re polished the tip a little bit. And i was running a cat for about 2 months... looked perfect... put a test pipe on it (still had stock exhaust) and the tip became nearly 100% black after bout 2200 miles and the rear bumper has a good amount of "soot" on it.

-Ryan

 

Yea that would be because of the test pipe from what ive heard....where did u get it from? im lookin to gettin one also....i would suggest rubbin it with a clay bar....

 

i like the "burnt" look on the back bumper of white cars.

it look industrial.

 

LUCKILY my car is black.....but YES, runnning a test pipe will do this.

 

its cause of the testpipe, also might want to check your fuel.. might be a tad rich.. but id just wash the bumper and if you can, adjust your tip where its not right on the bumper, that might help

 

i have a frost white teg....same thing. i think its carbon deposits. i just use meguiars paint cleaner on it and polish and wax it back. No big deal.

 

if the bumper is getting yellow or black, you can spray some purple power(like mean green but better) and there is no scrubbing involved.