Guys... iv been reading few posts from UK and US peops using SLS or Brisk plugs for there c63 after longtube header upgrade.
My question plug needs to be gapped 0.38-0.40. Do you go for OEN SLS or Brisk. If Brisk which ones Iriduim or silver racing
My question plug needs to be gapped 0.38-0.40. Do you go for OEN SLS or Brisk. If Brisk which ones Iriduim or silver racing
