1978 SC/ exhaust,muffler, header,etc....SSIversusGHL
amigos
thinking about upgrading my 1978 911 sc exhaust/header to get some extra power
doubting between ssi and ghl
what is the main difference between both quality manufacturers
any sc's out there that have felt a real power increase after installing ?
15-20 bhp?
thx for the info
kaotik | Belgium
|