Originally Posted by NELSON.MLGB
Will this make more drone to the car？
Originally Posted by Linda_the_Cat
Same concern here if you might answer.
I had my exhaust shop close to me take out the secondary cats and replace it with pipes with a small "crush" at the end so it would fit in the x pipe.
It does NOT drone, and it actually sounds very very good. Has more of a rumble and you can definitely hear its presence under load. I don't feel significant power gains, but it feels more "free."
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.