VALVE GUIDE SET 4G63 (TA309A-MT01A) 4019 Eliminates the restrictive catalytic converter

Eliminates the restrictive catalytic converter on the wastegate for increased flow and improved wastegate sound characteristics

6214510 is a 6-pad spring-centered race discs made with high quality ceramic friction materials

BMW dealerships have the capability to detect DME modifications even if the original tune is restored

race-grade materials

Up to 80 hp gains and 100 ft-lbs torque gains are measured at the rear wheels on the dyno

VALVE GUIDE SET 4G63 (TA309A-MT01A) 4019 Eliminates the restrictive catalytic converterWe chose to use Phosphor Bronze (Cn Sn P alloy) to make our Valve Guides, for its highly tensile and superior heat transferring ability, which is vital in high power and high RPM outputting engines. Since race engines these days require more power at higher RPM use , these engines now experience more extreme heat conditions. These conditions will increase the deterioration rate on these valve train related components. The Phosphor Bronze material has