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whilst at the same time removing restrictions caused by tight radius bends in factory manifolds which therefor increases exhaust gas flow exponentially
RB25 Neo Coil Kit
The 7psi Version is a direct replacement for the factory item
Astra GTC and Zafira
PAC 1204X Premium Dual Spring x 16 PAC- 1204X 1150cc whilst at the same time145lb at 1. 800" installed height. 385lb at 0. 650" valve lift. CHEVROLET LS1. PAC 1204X RPM Series Dual Spring set of 16. \nPremium quality Japanese spring steel wound in USA by PAC. Made with advanced heat treatment processing and surface finishing techniques (nano peening) to extend fatigue life. \nHigh spring frequency to allow for better spring surge control at high rpm. \n \n145lb at 1. 800" installed height. \n385lb at 0. 650" valve lift.
