{"product_id":"comp-cams-cbvi-299th-r7-thumper-camshaft-for-chevy-454-502-big-block-engines","title":"COMP Cams CBVI 299Th R7 Thumper Camshaft for Chevy 454\/502 Big Block Engines","description":"Designed 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.\nStreet\/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.\n1996-1999 Chevrolet 454\/502 GEN VI Big Block\n\u003cp\u003eThe COMP Cams CBVI 299Th R7 Thumper camshaft is engineered to deliver a bold, aggressive exhaust note at idle, making it a popular choice for muscle cars and street rods seeking a distinctive sound. Designed specifically for 1996-1999 Chevrolet 454 and 502 Gen V and VI Big Block engines, this camshaft features early intake valve opening and extended exhaust duration, optimizing overlap for a race-inspired idle and enhanced performance. Its design facilitates substantial horsepower gains and a broad torque curve, ideal for street\/strip applications with a compression ratio of 9.5:1 or higher, and setups with 2800+ stall converters, headers, and gears. The Thumpr series' unique grind requires an aftermarket torque converter and a lower gear ratio to ensure the engine stays within its powerband during aggressive driving. Due to its reduced vacuum at idle, a vacuum canister, pump, or hydroboost is necessary when running power brakes, ensuring reliable brake function for street use. This camshaft is not carburetor approved and requires carb acknowledgment, emphasizing its suitability for custom setups and performance builds. Whether upgrading a muscle car or street rod, the COMP Cams Thumpr series provides a commanding sound profile and solid performance gains, making it a preferred choice for enthusiasts looking to maximize their engine's potential.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eAggressive, race-inspired exhaust note at idle\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEarly intake valve opening and long exhaust duration for optimal overlap\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for 1996-1999 Chevrolet 454\/502 Big Block engines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIdeal for street\/strip applications with high stall converters\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRequires aftermarket torque converter and lower gear ratio for best performance\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eReduced vacuum at idle necessitates vacuum canister or hydroboost for power brakes\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEnhances horsepower and broadens torque curve\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFits\u003cbr\u003e\nChevrolet C2500 Base 1996\u003cbr\u003e\nChevrolet C2500 Base 1997\u003cbr\u003e\nChevrolet C2500 Base 1999\u003cbr\u003e\nChevrolet C2500 Base 2000\u003cbr\u003e\nChevrolet C2500 Cheyenne 1996\u003cbr\u003e\nChevrolet C2500 Cheyenne 1997\u003cbr\u003e\nChevrolet C2500 Cheyenne 1998\u003cbr\u003e\nChevrolet C2500 LS 1999\u003cbr\u003e\nChevrolet C2500 LS 2000\u003cbr\u003e\nChevrolet C2500 Silverado 1996\u003cbr\u003e\nChevrolet C2500 Silverado 1997\u003cbr\u003e\nChevrolet C2500 Silverado 1998\u003cbr\u003e\nChevrolet C2500 WT 1998\u003cbr\u003e\nChevrolet C2500 Suburban Base 1996\u003cbr\u003e\nChevrolet C2500 Suburban Base 1997\u003cbr\u003e\nChevrolet C2500 Suburban Base 1998\u003cbr\u003e\nChevrolet C2500 Suburban Base 1999\u003cbr\u003e\nChevrolet C2500 Suburban LS 1996\u003cbr\u003e\nChevrolet C2500 Suburban LS 1997\u003cbr\u003e\nChevrolet C2500 Suburban LS 1998\u003cbr\u003e\nChevrolet C2500 Suburban LS 1999\u003cbr\u003e\nChevrolet C2500 Suburban LT 1996\u003cbr\u003e\nChevrolet C2500 Suburban LT 1997\u003cbr\u003e\nChevrolet C3500 Base 1996\u003cbr\u003e\nChevrolet C3500 Base 1997\u003cbr\u003e\nChevrolet C3500 Base 1999\u003cbr\u003e\nChevrolet C3500 Base 2000\u003cbr\u003e\nChevrolet C3500 Cheyenne 1996\u003cbr\u003e\nChevrolet C3500 Cheyenne 1997\u003cbr\u003e\nChevrolet C3500 Cheyenne 1998\u003cbr\u003e\nChevrolet C3500 LS 1999\u003cbr\u003e\nChevrolet C3500 LS 2000\u003cbr\u003e\nChevrolet C3500 Silverado 1996\u003cbr\u003e\nChevrolet C3500 Silverado 1997\u003cbr\u003e\nChevrolet C3500 Silverado 1998\u003cbr\u003e\nChevrolet Express 3500 Base 1996\u003cbr\u003e\nChevrolet Express 3500 Base 1997\u003cbr\u003e\nChevrolet Express 3500 Base 1998\u003cbr\u003e\nChevrolet Express 3500 Base 1999\u003cbr\u003e\nChevrolet Express 3500 Base 2000\u003cbr\u003e\nChevrolet Express 3500 LS 1996\u003cbr\u003e\nChevrolet Express 3500 LS 1997\u003cbr\u003e\nChevrolet Express 3500 LS 1998\u003cbr\u003e\nChevrolet Express 3500 LS 1999\u003cbr\u003e\nChevrolet Express 3500 LS 2000\u003cbr\u003e\nChevrolet G30 Beauville 1996\u003cbr\u003e\nChevrolet G30 Chevy Van 1996\u003cbr\u003e\nChevrolet G30 Hi-Cube 1996\u003cbr\u003e\nChevrolet G30 Sportvan 1996\u003cbr\u003e\nChevrolet K2500 Base 1996\u003cbr\u003e\nChevrolet K2500 Base 1997\u003cbr\u003e\nChevrolet K2500 Base 1999\u003cbr\u003e\nChevrolet K2500 Base 2000\u003cbr\u003e\nChevrolet K2500 Cheyenne 1996\u003cbr\u003e\nChevrolet K2500 Cheyenne 1997\u003cbr\u003e\nChevrolet K2500 Cheyenne 1998\u003cbr\u003e\nChevrolet K2500 LS 1999\u003cbr\u003e\nChevrolet K2500 LS 2000\u003cbr\u003e\nChevrolet K2500 Silverado 1996\u003cbr\u003e\nChevrolet K2500 Silverado 1997\u003cbr\u003e\nChevrolet K2500 Silverado 1998\u003cbr\u003e\nChevrolet K2500 WT 1998\u003cbr\u003e\nChevrolet K2500 Suburban Base 1996\u003cbr\u003e\nChevrolet K2500 Suburban Base 1997\u003cbr\u003e\nChevrolet K2500 Suburban Base 1998\u003cbr\u003e\nChevrolet K2500 Suburban Base 1999\u003cbr\u003e\nChevrolet K2500 Suburban LS 1996\u003cbr\u003e\nChevrolet K2500 Suburban LS 1997\u003cbr\u003e\nChevrolet K2500 Suburban LS 1998\u003cbr\u003e\nChevrolet K2500 Suburban LS 1999\u003cbr\u003e\nChevrolet K2500 Suburban LT 1996\u003cbr\u003e\nChevrolet K2500 Suburban LT 1997\u003cbr\u003e\nChevrolet K3500 Base 1996\u003cbr\u003e\nChevrolet K3500 Base 1997\u003cbr\u003e\nChevrolet K3500 Base 1999\u003cbr\u003e\nChevrolet K3500 Base 2000\u003cbr\u003e\nChevrolet K3500 Cheyenne 1996\u003cbr\u003e\nChevrolet K3500 Cheyenne 1997\u003cbr\u003e\nChevrolet K3500 Cheyenne 1998\u003cbr\u003e\nChevrolet K3500 LS 1999\u003cbr\u003e\nChevrolet K3500 LS 2000\u003cbr\u003e\nChevrolet K3500 Silverado 1996\u003cbr\u003e\nChevrolet K3500 Silverado 1997\u003cbr\u003e\nChevrolet K3500 Silverado 1998\u003cbr\u003e\nChevrolet P30 Base 1996\u003cbr\u003e\nChevrolet P30 Base 1997\u003cbr\u003e\nChevrolet P30 Base 1998\u003cbr\u003e\nChevrolet P30 Base 1999\u003cbr\u003e\nGMC C2500 Sierra SL 1996\u003cbr\u003e\nGMC C2500 Sierra SL 1997\u003cbr\u003e\nGMC C2500 Sierra SL 1998\u003cbr\u003e\nGMC C2500 Sierra SL 1999\u003cbr\u003e\nGMC C2500 Sierra SL 2000\u003cbr\u003e\nGMC C2500 Sierra SLE 1996\u003cbr\u003e\nGMC C2500 Sierra SLE 1997\u003cbr\u003e\nGMC C2500 Sierra SLE 1998\u003cbr\u003e\nGMC C2500 Sierra SLE 1999\u003cbr\u003e\nGMC C2500 Sierra SLE 2000\u003cbr\u003e\nGMC C2500 Sierra SLT 1996\u003cbr\u003e\nGMC C2500 Sierra SLT 1997\u003cbr\u003e\nGMC C2500 Sierra SLT 1998\u003cbr\u003e\nGMC C2500 Sierra SLT 1999\u003cbr\u003e\nGMC C2500 Sierra SLT 2000\u003cbr\u003e\nGMC C2500 Suburban Base 1996\u003cbr\u003e\nGMC C2500 Suburban Base 1997\u003cbr\u003e\nGMC C2500 Suburban Base 1998\u003cbr\u003e\nGMC C2500 Suburban Base 1999\u003cbr\u003e\nGMC C2500 Suburban SLE 1996\u003cbr\u003e\nGMC C2500 Suburban SLE 1997\u003cbr\u003e\nGMC C2500 Suburban SLE 1998\u003cbr\u003e\nGMC C2500 Suburban SLE 1999\u003cbr\u003e\nGMC C2500 Suburban SLT 1996\u003cbr\u003e\nGMC C2500 Suburban SLT 1997\u003cbr\u003e\nGMC C2500 Suburban SLT 1998\u003cbr\u003e\nGMC C2500 Suburban SLT 1999\u003cbr\u003e\nGMC C3500 Sierra SL 1996\u003cbr\u003e\nGMC C3500 Sierra SL 1997\u003cbr\u003e\nGMC C3500 Sierra SL 1998\u003cbr\u003e\nGMC C3500 Sierra SL 1999\u003cbr\u003e\nGMC C3500 Sierra SL 2000\u003cbr\u003e\nGMC C3500 Sierra SLE 1996\u003cbr\u003e\nGMC C3500 Sierra SLE 1997\u003cbr\u003e\nGMC C3500 Sierra SLE 1998\u003cbr\u003e\nGMC C3500 Sierra SLE 1999\u003cbr\u003e\nGMC C3500 Sierra SLE 2000\u003cbr\u003e\nGMC C3500 Sierra SLT 1996\u003cbr\u003e\nGMC C3500 Sierra SLT 1997\u003cbr\u003e\nGMC C3500 Sierra SLT 1998\u003cbr\u003e\nGMC C3500 Sierra SLT 1999\u003cbr\u003e\nGMC C3500 Sierra SLT 2000\u003cbr\u003e\nGMC G3500 Magnavan 1996\u003cbr\u003e\nGMC G3500 Rally 1996\u003cbr\u003e\nGMC G3500 Rally Camper Special 1996\u003cbr\u003e\nGMC G3500 Rally STX 1996\u003cbr\u003e\nGMC G3500 Vandura 1996\u003cbr\u003e\nGMC G3500 Vandura Special 1996\u003cbr\u003e\nGMC K2500 Sierra SL 1996\u003cbr\u003e\nGMC K2500 Sierra SL 1997\u003cbr\u003e\nGMC K2500 Sierra SL 1998\u003cbr\u003e\nGMC K2500 Sierra SL 1999\u003cbr\u003e\nGMC K2500 Sierra SL 2000\u003cbr\u003e\nGMC K2500 Sierra SLE 1996\u003cbr\u003e\nGMC K2500 Sierra SLE 1997\u003cbr\u003e\nGMC K2500 Sierra SLE 1998\u003cbr\u003e\nGMC K2500 Sierra SLE 1999\u003cbr\u003e\nGMC K2500 Sierra SLE 2000\u003cbr\u003e\nGMC K2500 Sierra SLT 1996\u003cbr\u003e\nGMC K2500 Sierra SLT 1997\u003cbr\u003e\nGMC K2500 Sierra SLT 1998\u003cbr\u003e\nGMC K2500 Sierra SLT 1999\u003cbr\u003e\nGMC K2500 Sierra SLT 2000\u003cbr\u003e\nGMC K2500 Suburban Base 1996\u003cbr\u003e\nGMC K2500 Suburban Base 1997\u003cbr\u003e\nGMC K2500 Suburban Base 1998\u003cbr\u003e\nGMC K2500 Suburban Base 1999\u003cbr\u003e\nGMC K2500 Suburban SLE 1996\u003cbr\u003e\nGMC K2500 Suburban SLE 1997\u003cbr\u003e\nGMC K2500 Suburban SLE 1998\u003cbr\u003e\nGMC K2500 Suburban SLE 1999\u003cbr\u003e\nGMC K2500 Suburban SLT 1996\u003cbr\u003e\nGMC K2500 Suburban SLT 1997\u003cbr\u003e\nGMC K2500 Suburban SLT 1998\u003cbr\u003e\nGMC K2500 Suburban SLT 1999\u003cbr\u003e\nGMC K3500 Sierra SL 1996\u003cbr\u003e\nGMC K3500 Sierra SL 1997\u003cbr\u003e\nGMC K3500 Sierra SL 1998\u003cbr\u003e\nGMC K3500 Sierra SL 1999\u003cbr\u003e\nGMC K3500 Sierra SL 2000\u003cbr\u003e\nGMC K3500 Sierra SLE 1996\u003cbr\u003e\nGMC K3500 Sierra SLE 1997\u003cbr\u003e\nGMC K3500 Sierra SLE 1998\u003cbr\u003e\nGMC K3500 Sierra SLE 1999\u003cbr\u003e\nGMC K3500 Sierra SLE 2000\u003cbr\u003e\nGMC K3500 Sierra SLT 1996\u003cbr\u003e\nGMC K3500 Sierra SLT 1997\u003cbr\u003e\nGMC K3500 Sierra SLT 1998\u003cbr\u003e\nGMC K3500 Sierra SLT 1999\u003cbr\u003e\nGMC K3500 Sierra SLT 2000\u003cbr\u003e\nGMC P3500 Base 1996\u003cbr\u003e\nGMC P3500 Base 1997\u003cbr\u003e\nGMC P3500 Base 1998\u003cbr\u003e\nGMC P3500 Base 1999\u003cbr\u003e\nGMC Savana 3500 Base 1996\u003cbr\u003e\nGMC Savana 3500 Base 1997\u003cbr\u003e\nGMC Savana 3500 Base 1998\u003cbr\u003e\nGMC Savana 3500 Base 1999\u003cbr\u003e\nGMC Savana 3500 Base 2000\u003cbr\u003e\nGMC Savana 3500 SLE 1996\u003cbr\u003e\nGMC Savana 3500 SLE 1997\u003cbr\u003e\nGMC Savana 3500 SLE 1998\u003cbr\u003e\nGMC Savana 3500 SLE 1999\u003cbr\u003e\nGMC Savana 3500 SLE 2000","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":55158160392497,"sku":"4389635","price":629.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/2247\/1473\/files\/747b041b85933e6f2624663a10d8ab24_a08e5997-7d6c-40d1-85be-2d8daf181e90.jpg?v=1783578519","url":"https:\/\/shop.topspeedcincy.com\/products\/comp-cams-cbvi-299th-r7-thumper-camshaft-for-chevy-454-502-big-block-engines","provider":"Top Speed Cincy Shop","version":"1.0","type":"link"}