Engines and Components› Camshafts and Valvetrain

SpeedCams

81 Series Performance Camshafts V12

$1,897.50

SKU: TJP81V12

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Overview

The SpeedCams TJP81V12 is a pair of performance camshafts designed for V12 cylinder engines. These camshafts are intended for competition use only.

The 81 Series cams feature an inlet lift of 0.490 inches with a duration of 279, and an exhaust lift of 0.480 inches with a duration of 269. Installation requires notching the tappet guide to clear the cam lobe and using Competition Valve Springs JA005 & JA006 to maintain .50 inches above coil bind.
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The SpeedCams TJP81V12 is a pair of performance camshafts engineered for V12 cylinder engines. These high-performance components are specifically designed and intended for competition use only, offering enhanced engine operation. The 81 Series camshafts boast precise specifications: an inlet lift of 0.490 inches and a duration of 279, coupled with an exhaust lift of 0.480 inches and a duration of 269. These figures indicate a significant upgrade in valve timing and lift for increased power output. Installation of these competition camshafts requires specific modifications. The tappet guide must be notched to ensure clearance for the cam lobe. Additionally, it is recommended to use Competition Valve Springs JA005 & JA006 to maintain a minimum of .50 inches above coil bind, ensuring proper valve train function under high-stress conditions.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandSpeedCams
Part NumberTJP81V12
CategoryEngines and Components

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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