{"product_id":"engine-camshaft-parts-cca10-602-11","title":"Thumpr Hydraulic Roller Camshaft \u003cbr\u003e 66-91 American Motors 290-401","description":"\u003cb\u003eDescription:\u003c\/b\u003e\u003cbr\u003e\n\u003cbr\u003eDesigned to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\n\u003cli\u003eCamshaft Series: Thumpr\n\u003c\/li\u003e\u003cli\u003eLobe Separation: 107 DD\n\u003c\/li\u003e\u003cli\u003eIntake Valve Lift: 0.552 IN\n\u003c\/li\u003e\u003cli\u003eExhaust Valve Lift: 0.537 IN\n\u003c\/li\u003e\u003cli\u003eLifters Included: No\n\u003c\/li\u003e\u003cli\u003eValve Springs Required: Yes\n\u003c\/li\u003e\u003cli\u003eAssembly Lubricant Included: No\n\u003c\/li\u003e\u003cli\u003eCamshaft Gear Attachment: 1-Bolt\n\u003c\/li\u003e\u003cli\u003eCamshaft Material: Billet Steel\n\u003c\/li\u003e\u003cli\u003eEngine Family: American Motors 290-401 c.i. 8 Cylinder (1966-1991)\n\u003c\/li\u003e\u003cli\u003eUsage: Street\/Performance\n\u003c\/li\u003e\u003cli\u003eLifter Type: Hydraulic Roller\n\u003c\/li\u003e\u003cli\u003eCam Type: Hydraulic Roller\n\u003c\/li\u003e\u003cli\u003eGrind Number: 299THR7\n\u003c\/li\u003e\u003cli\u003eGrind Number: 299THR7\n\u003c\/li\u003e\u003cli\u003eBasic Operating RPM Range: 2,500-6,400\n\u003c\/li\u003e\u003cli\u003eIntake Duration at .050 Inch Lift: 243 DD\n\u003c\/li\u003e\u003cli\u003eExhaust Duration at .050 inch Lift: 257 DD\n\u003c\/li\u003e\u003cli\u003eAdvertised Intake Duration: 299 DD\n\u003c\/li\u003e\u003cli\u003eAdvertised Exhaust Duration: 319 DD\u003c\/li\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Includes:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\n\u003cli\u003eEngine Camshaft\u003c\/li\u003e","brand":"Comp Cams","offers":[{"title":"Default Title","offer_id":52886333849963,"sku":"CCA-10-602-11","price":579.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1961\/1987\/files\/CCA-10-602-11-1.jpg?v=1770599672","url":"https:\/\/caautoparts.com\/products\/engine-camshaft-parts-cca10-602-11","provider":"CA Auto Parts","version":"1.0","type":"link"}