Gm Tbi Power Up Kit. Includes 1/4\" Thick Injector Spacer (Design May Vary), 14Psi Regulator Spring And Instructions On Modifying Your Oem Stock Tbi Base To Add Enough Fuel And Air To Support Up To A 40Hp With Power Adders Such As Headers, Free Flow Exhaust Intake And Small Cam Upgrades. Adds 14Hp On A Stock 5.7L Tbi Motor.
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