VALVE GUIDE SET RB25DE(T)/RB20DE(T) (TA309A-NS06A) 18505 The bulk of the power

The bulk of the power gains from the IPD Plenum begin around 4000 rpm

sporty sound to your Explorer ST

Designed and Manufactured In-House at STILLEN to ensure the highest standards of quality

The intercooler piping kit optimize and smooth out the air flow

Rear 1998 Chevrolet K1500 Suburban w/ 11 in

VALVE GUIDE SET RB25DE(T)/RB20DE(T) (TA309A-NS06A) 18505 The bulk of the powerWe 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