Originally Posted by graider
never really impressed with the SLS. knowing the same engine in the SLS is in the c63 AMG at quarter the price, I have a hard time accepting that. Plus the rear of the SLS is meh.
They have similarities but not the same engine. The P31 M156 resembles closer to the M159.
Think of a CTS-V and ZR1 engine.
The SLS has a magnesium intake with 8 separate velocity stacks (M156 has dual 74mm throttle bodies), revised cams, forged & balanced crankshaft, forged pistons, dry sump oil system, mid length headers.