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Throttle body spacer plate
you cannot mill your cylinder heads without the possibility of needing to flycut your pistons
The AT4/Trail Boss are factory equipped with a 2" front lift
If you install this part on your vehicle and use the vehicle on a public road or highway
and concern of compressing springs
BTR GEN III & IV LS TRUCK NORRIS CAM lift Throttle body spacer plateBTR GEN III & IV LS TRUCK NORRIS CAM Specs: 212 22X, . 552 . 552, 107 LSA The Truck Norris will deliver a roundhouse kick in the pants to your 1999 2013 Silverado or Sierra. Developed from hundreds of hours of in house cam lobe design and dyno testing, this camshaft has more power and torque everywhere in the curve compared to our legendary V2 truck cams.
