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• Fits GT55
the vacuum/boost reference line does not need to be installed since maximum fuel pressure does not exceed 120psi
D-mode is optimized for everyday daily driving and economy
• Requires 1/8 PT Screw machining on the stock balance tube for installing a blowby union
GSC 4G63 Exhaust Valve Guides Shorty with Stopper (3005) fuelab • Fits GT55The GSC Power Division stopper style shorty exhaust valve guides for 4G63 Evo and DSM. Standard sized guides are sold as set of 8 or individually. Oversized +0. 001" and +0. 003" options are sold individually. Please double check your purchase and quantities. Vehicle Fitment: Mitsubishi 4G63 1992 2006 Evolution I IX 1990 1999 Eclipse GST GSX 1990 1998 Talon TSi 1990 1994 Laser RS 1991 1992 Galant VR4 Specs: Total Length: 1. 800" 45. 72mm Outer