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♦ Sonic MS | Race Precision (RPi) GTM Exhaust System for the E92 M3
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07-20-2011, 12:01 AM
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inagua
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Drives: F82 M4, X5 35d, m235
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exhaust
love the sound of the GTM cat back system but the HP gains of the full race system. Dont want to "tune" out the CEL.
Any idea of the HP gains with just the cat back system.
Appreciate
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