Brian Tooley BTR Truck Norris NSR Cam Kit – No Springs Required – +56HP +13TQ + LS7 Lifters + Trunnion Upgrade + Pushrods + LS1 Head Gaskets + Valve Seals – LS 5.7L 4.8L 5.3L

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 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. 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 a professional installer would spec — BTR Truck Norris NSR camshaft, 16 premium LS7-style roller lifters with lifter trays, hardened chromoly pushrods at 7.400″ length and 0.080″ wall thickness, premium valve stem seals, front timing cover gasket set, 2 LS1-style MLS head gaskets, and a premium LS rocker arm trunnion upgrade kit. One order, one shipment, zero guesswork. Lifetime warranty if installed by a certified machinist.

The 16 premium LS7-style roller lifters with lifter trays reduce friction, improve oiling and stability at high RPM, maintain correct cam and lifter contact patterns for longer life, and simplify break-in for reliable valvetrain performance under load — the first upgrade every serious LS builder makes on any 5.7L LS1 cam swap, 4.8L sleeper build, or 5.3L lopey truck cam swap. The hardened chromoly pushrods at 7.400″ length and 0.080″ wall thickness provide precise valve actuation and maximum strength under high performance conditions — stock pushrods flex under load on every LS cam swap and these don’t. The LS1-style MLS head gaskets are precision matched to the cathedral port cylinder heads found on 5.7L, 4.8L, and 5.3L LS engines — delivering superior crush resistance and long-term sealing reliability that composite gaskets simply cannot match. The premium LS rocker arm trunnion upgrade kit converts your stock LS rocker arms into captured roller bearing rocker arms — eliminating the factory failure point that has caused catastrophic engine damage in countless LS builds. 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 5.7L, 4.8L, and 5.3L cathedral port Vortec V8 LS cam swap engines including LS1, LR4, LM7, L59, LM4, L33, LH6, LC9, LY5, and LMG. Fits Camaro, Corvette, Firebird, Trans Am, Pontiac GTO, Pontiac G8, Silverado 1500/2500, Sierra 1500/2500, Tahoe, Suburban, Yukon, Escalade, and Avalanche. Works well with stock torque converters — no stall upgrade needed. Reuses factory valve springs — no spring 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. Professional tune required for all applications. Big power. Broad powerband. Built for the street.
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. The premium LS rocker arm trunnion upgrade kit converts your stock LS rocker arms into captured roller bearing rocker arms — eliminating the factory failure point that has caused catastrophic engine damage in countless LS builds. Even on a no springs required cam swap the trunnion upgrade is one of the most critical upgrades you can make on any 4.8L, 5.3L, 6.0L, or 6.2L LS build — trusted in everything from stock 4.8L daily drivers to 1,000+ horsepower turbo motors. 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. 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.

• COMPREHENSIVE 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), 16 Premium LS7-Style Roller Lifters with Lifter Trays, Hardened Chromoly Pushrods (7.400″, 0.080″ wall), Premium Valve Stem Seals, Front Timing Cover Gasket Set, 2 LS1-Style MLS Head Gaskets, and a Premium LS Rocker Arm Trunnion Upgrade Kit. Lifetime warranty if installed by a certified machinist. Most complete BTR Truck Norris NSR cam kit for 5.7L 4.8L and 5.3L LS cam swaps.
• 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 — reuses your factory valve springs for the simplest most affordable 5.7L LS1, 4.8L, and 5.3L LS cam swap install available anywhere.
• 16 PREMIUM LS7 ROLLER LIFTERS WITH TRAYS + 7.400″ HARDENED PUSHRODS – Premium LS7-style roller lifters with lifter trays reduce friction improve oiling and stability at high RPM maintain correct cam and lifter contact patterns for longer life and simplify break-in for reliable valvetrain performance under load — the first upgrade every serious LS builder makes on any 5.7L LS1 cam swap, 4.8L sleeper build, or 5.3L lopey truck cam swap. Hardened chromoly pushrods at 7.400″ length and 0.080″ wall thickness eliminate flex under load — stock pushrods flex these don’t.
• PREMIUM LS ROCKER ARM TRUNNION UPGRADE KIT – DO NOT SKIP THIS ON YOUR LS BUILD – The factory LS rocker arm trunnion is a known failure point across the entire LS engine family. When the factory pressed-in needle bearings fail they send small bearings through the entire engine causing catastrophic damage to your 5.7L LS1, 4.8L, or 5.3L LS build. This retrofit trunnion kit converts stock LS rocker arms into captured roller bearing rocker arms — eliminating the factory failure point entirely. Trusted in everything from stock 4.8L daily drivers to 1,000+ horsepower turbo motors.
• NO SPRINGS REQUIRED – REUSES FACTORY VALVE SPRINGS – The BTR Truck Norris NSR is specifically engineered to work with your factory GM LS valve springs — making it the most affordable and easiest to install performance cam available for any 5.7L LS1, 4.8L, or 5.3L LS truck build. No spring 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.