E46 M3 Carbon Fiber Cold Air Intake Kit
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After a lot of dyno time testing various intakes, we found this system to offer the best combination of horsepower, fit/finish and price. On a stock M3 - this intake gained 7 rear wheel horsepower and 4 lb/pounds of torque (not a huge gain but equal or better than any other intake we tested) It does not require any software modification and installs in about 2 hours. There is only a minimal change in engine sound. Fit and finish is excellent and of course you have the ultra-strong and great looking, clear coated, 100% carbon fiber construction.