AstinaGT Forums - View Single Post - 2001 SP20, done some mods but no improvements?? help!

ezin · 08-10-2003, 07:45 PM

Aaron is right! U need 2 keep the exhaust gases flowing as fast & smooth as possible! Just remember, Smaller 2 bigger from front to rear, and ur car should go hard! If it can suck in the air aswell! (Cut out the plastic bit in the front grille for a quick mod to get air to the intake!) DONT make ur centre pipe bigger only 2 put a smaller muffler on the rear! This is a bad idea! Read some modification mags & U will see this is correct! I would recomend a WALKER straight through muffer that flows more than most muffers + it is very quiet REF ZOOM mag! just make the centre pipe smaller 2.25 & the rear mufler 2.5! u should notice it a fair bit! :mrgreen:

08-10-2003, 07:45 PM	#10
ezin AstinaGT Regular Join Date: Jul 2003 Location: melb Posts: 416	Aaron is right! U need 2 keep the exhaust gases flowing as fast & smooth as possible! Just remember, Smaller 2 bigger from front to rear, and ur car should go hard! If it can suck in the air aswell! (Cut out the plastic bit in the front grille for a quick mod to get air to the intake!) DONT make ur centre pipe bigger only 2 put a smaller muffler on the rear! This is a bad idea! Read some modification mags & U will see this is correct! I would recomend a WALKER straight through muffer that flows more than most muffers + it is very quiet REF ZOOM mag! just make the centre pipe smaller 2.25 & the rear mufler 2.5! u should notice it a fair bit! :mrgreen: