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      12-27-2012, 10:28 AM   #1
MikeE92M3's Avatar

Drives: 08 E92 M3
Join Date: May 2012
Location: Richmond, VA

iTrader: (5)

For those with test pipes/catless exhaust..

I noticed something interesting yesterday. I had my Turner Test pipes installed at my muffler shop that I have gone to for years for work done on my cars. The test pipes installed without a hitch, the cuts were made in the correct spots, etc, and clamped on tightly with an impact wrench.

We checked for clearance and nothing was touching anything, the heatshield was reinstalled the way it was, and all the bolts were screwed back in, as well.

However, I notice when I give it some "load" or heavy throttle (flooring it, giving it gas while making a turn) I feel like an "acoustic" vibration in the gas pedal? Has anyone else on this forum noticed something like that? It is only when the car is given a moderate to full amount of throttle. Is this because of the increase/loudness of the flow of exhaust gases in that area under the footwell/pedals where the test pipes were installed? Just wanted to see your thoughts before I freak out too much and bring it back in to have them double check it.

Mind you, I was under the car the entire time while the guy did it (good friends of my family), and EVERYTHING was bolted in tightly (header bolts, clamps).

Is this something I have to worry about it or should I let it "break in" a bit more?

Oh, but the extra power is AWESOME, too!!!
2008 (07/08) E92 M3 BPM Stage II Tuned by Mike Benvo, 6MT, Turner Test Pipes, Magnaflow Custom Catback Exhaust (Magnaflow X Pipe, secondary cat delete, Aero Resonators and Helmholtz Chambers),Vorsteiner CF Lip, Hamann Style CF rear diffuser, CF Rear Decklid Spoiler, BMW Performance Kidney Grills, CF Side Grills, OEM GTS Wheels, K&N Drop-In Filter, GP Thunder 8k Angel Eyes, Painted Reflectors.