with the correct angle for the exhaust flow to force a vacuum. and yes, if it gets a significant amount of oil it can catch fire and burn out your exhaust until it cleans up, nice black smoke.
------------------------------------------------------------------ 1992 300ZX NA 5 Sp (Dead) 1990 300ZX NA Auto 2+2 (Dead) 1990 300ZX TT 5 Sp (Est. 400 HP) 1990 300ZX TT 5 Sp (Est. 600 HP) 2004 G35 Sport 6MT (DD) |