Brian Tooley BTR Truck Norris NSR Cam Kit .498/.498 212/22X 107 LSA No Springs Required + Valve Seals + Timing Gasket – Fits 4.8L 5.3L 6.0L 6.2L LM7 LR4 L59 LQ4 LQ9 L76 – +56HP

Description

The Brian Tooley Racing BTR Truck Norris NSR is the no springs required version of the immensely popular Truck Norris camshaft — delivering dyno-proven gains of approximately 56 horsepower and 13 lb-ft of torque while retaining full compatibility with your factory valve springs and pushrods for the simplest most affordable LS cam swap install possible. Featuring .498″/.498″ lift, 212/22X duration, and 107 LSA, the Truck Norris NSR sacrifices only a slight amount of power from the original Truck Norris in exchange for the convenience of being able to reuse your factory valve springs and pushrods. The idle sound is similar to more aggressive truck camshafts yet it will behave well with stock torque converters — delivering low-end grunt from idle and launch, immediate throttle snap, thick midrange shove from approximately 1,400–4,200 RPM for effortless passing and towing, smooth transition into the upper midrange to 6,200 RPM, and a deeper truck-friendly idle tone with predictable part-throttle manners for daily driving. This complete kit includes everything you need — BTR Truck Norris NSR camshaft, premium valve stem seals, and a front timing cover gasket set. One order, one shipment, zero guesswork.

The BTR Truck Norris NSR was developed from hundreds of hours of in-house cam lobe design and dyno testing — delivering more power and torque everywhere in the curve compared to BTR’s legendary V2 truck cams while keeping the install as simple and affordable as possible. Please note that if your engine has high mileage BTR still recommends replacing the springs for best performance — in which case the original Truck Norris camshaft package with springs included would be the ideal option. The premium valve stem seals keep oil consumption in check after the build and maintain optimal engine efficiency for smooth reliable operation and long term performance longevity on any 4.8L, 5.3L, 6.0L, or 6.2L LS cam swap build. Brian Tooley Racing camshafts are designed and engineered in the USA — backed by hundreds of hours of in-house dyno development and real world engine testing.

Compatible with 1999–2014 GM 4.8L, 5.3L, 6.0L, and 6.2L Vortec V8 LS cam swap engines including LR4, LM7, L59, LM4, L33, LH6, LC9, LY5, LMG, LQ4, LQ9, L76, L92, and L96. Fits Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Avalanche, Camaro, Corvette, Firebird, Pontiac GTO, and Pontiac G8. Works well with stock torque converters — no stall upgrade needed. Reuses factory valve springs and pushrods — the most affordable and easiest to install BTR truck cam available for any 4.8L, 5.3L, 6.0L, or 6.2L LS truck build. Professional tune required for all applications. Big power. Broad powerband. Built for the street.

• COMPLETE BTR TRUCK NORRIS NSR CAM KIT – Brian Tooley Racing BTR Truck Norris NSR No Springs Required Camshaft (.498″/.498″, 212/22X, 107 LSA, 3-Bolt), Premium Valve Stem Seals, and a Front Timing Cover Gasket Set. The most complete BTR Truck Norris NSR cam kit for 4.8L 5.3L 6.0L and 6.2L LS cam swaps — reuses factory valve springs and pushrods for the simplest most affordable LS cam swap install available anywhere.
• DYNO PROVEN +56HP +13TQ – NO SPRINGS REQUIRED – .498″/.498″ Lift, 212/22X Duration, 107 LSA, 1,400–6,200 RPM Operating Range. Dyno-proven gains of approximately 56 horsepower and 13 lb-ft of torque — developed from hundreds of hours of in-house cam lobe design and dyno testing. The no springs required version of the immensely popular BTR Truck Norris — sacrifices only a slight amount of power from the original in exchange for the convenience of reusing your factory valve springs and pushrods on any 4.8L 5.3L 6.0L or 6.2L LS build.
• NO SPRINGS REQUIRED – REUSES FACTORY VALVE SPRINGS AND PUSHRODS – The BTR Truck Norris NSR is specifically engineered to work with your factory GM LS valve springs and pushrods — making it the most affordable and easiest to install performance cam available for any 4.8L, 5.3L, 6.0L, or 6.2L LS truck build. No spring upgrade needed no pushrod upgrade needed — just install the cam and drive. Please note that if your engine has high mileage BTR still recommends replacing the springs for best performance.
• DRIVE CHARACTER – LOW END GRUNT THICK MIDRANGE SHOVE – The BTR Truck Norris NSR delivers low-end grunt from idle and launch, immediate throttle snap, and thick midrange shove from approximately 1,400–4,200 RPM for effortless passing and towing. Smooth transition into the upper midrange to 6,200 RPM with a deeper truck-friendly idle tone and predictable part-throttle manners for daily driving — improved towing and haul confidence under load on every 4.8L 5.3L 6.0L or 6.2L LS truck build.
• BTR TRUCK NORRIS NSR – MORE POWER THAN BTR’S LEGENDARY V2 TRUCK CAMS – Developed from hundreds of hours of in-house cam lobe design and dyno testing — the Truck Norris NSR has more power and torque everywhere in the curve compared to BTR’s legendary V2 truck cams. An idle sound similar to more aggressive truck camshafts yet behaves well with stock torque converters — the roundhouse kick your 1999–2014 GM V8 truck or SUV deserves without the cost and complexity of a full spring upgrade.