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      12-10-2012, 04:43 PM   #5
MikeE92M3's Avatar

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

iTrader: (5)

Originally Posted by m3an View Post
bump for OP;

yes they should be 2.5 diam; IMO these look like Vibrant brand, so you can look up specifici specs there and I would be hard pressed to believe Challenge makes their own resonators.
+1. These look very similar to the Aero AR25 resonators minus the more conical ends. I paid 72 shipped for 2 aero resonators that look like these and have a cool etched/raised logo on them.

OP, you may want to drop the price just a little bit--I think more people will bite then.
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.