Thumpr Series cam and lifter kits deliver a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance. Thumpr camshafts are available in different grind profiles each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. The lobe profile and grind characteristics of these Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. In an ongoing quest to provide you with the performance and sound you demand, COMP Cams engineering team proudly introduces the Thumpr Series cam and lifter kits. Rebate form and details available at /performance/offers.COMP Cams is bringing the muscle car sound back, and it's nastier than ever! Let's face it-few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. Allow 6 to 8 weeks for delivery of debit card.

But since this looks to be a throttle body setup try the suggested 10 deg ,then try 14, and it thats ok then try 18 deg base timing. for approx 36-38 total depending on how you cut it for a carb setup. Rebates may be submitted over two invoices within 120 days of each other. Even a mild rv cam will noramlly need approx 16-18 deg base timing and 18-20 deg mech in by 2800 rpm (if ruuning fairly high highway gear). See for details, applicable rebate amounts, and rebate form. Mail-in rebate offer not available with other offers. dealer or Chevrolet Performance Authorized Reseller.

††Must be purchased from a participating U.S. Warranty valid when all required components are installed on the same vehicle and purchased on one invoice. Coverage limited to defects in material and/or workmanship of the specific part only. Parts only when consumer repaired or installed in non-highway application. †Parts and labor warranty when installed by a GM Dealer or qualified installing independent Service Center (ISC) or when sold over the counter and REPAIRED by a GM Dealer or qualifying ISC.

Chevy 350 tbi cam