Wow 700hp M5! Now that is amazing!
But with that much HP it can only do 11.4 seconds in 1/4 miles?
Doesn't the stock one do 11.78 already?
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2011 535i Alpine White, Oyster on black interior, Premium 1 & 2 Package, Magnaflow Full Cat-Back Exhaust, JB4 Stage 2
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