Originally Posted by rjd598
im sure people who have test pipes will chime in but from what i've read the sound is barely any louder and smell is almost non existent. that's all with just test pipes
Really? Very interesting..
The primary cats look SO small anyways, I can't imagine them making the exhaust smell after!
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.