What would be the difference in sound and power gains when comparing the challenge street to the other 2 models (Sports, Race). I know the Race is completely catless so it would have the greatest power increase. What would I be losing if I went with the Street version?
2008 BMW M3 e92 Space Grey/Silver Novillo // 20% tint // Hardwired V1 // Painted side reflectors // Matte black kidney grills // Matte black side gills // BMW Performance steering wheel // Match Schnell air filter // RPi Scoops // Gintani Race exhaust //
2010 Lamborghini LP560-4 Spyder