This camshaft is NEW for 2015! Tick Performance proudly offers our Elite Series of Camshafts designed specifically for 4.8L & 5.3L Engines! Using the latest and greatest technology available, we've put together a complete line of Camshafts that are designed to meet every goal, from mild to wild. Our Elite Series of Camshafts are all manufactured by Cam Motion and are updated with a new version every time an advancement in valvetrain technology becomes available, so they're ALWAYS cutting-edge! Although we suggest measuring for piston-to-valve clearance during ANY camshaft install, every Elite Series Camshaft is designed to fit in a stock engine & stock heads with adequate clearance unless otherwise noted. These cams are designed to maximize power, reliability and valvetrain longevity. Tick Performance Turbo Stage 2 Camshaft for 4.8L & 5.3L Engines219/223 | .617"/.595" | LSA114+3 Designed for: All 4.8L & 5.3L engines, including LR4, LM7, L59, LM4, L33, etc.Basic Operating RPM Range: 2000-6400Expected Horsepower Gains: 60-70RWHP over the stock camshaft in a well-optimized setup (the higher the boost, the higher the gains!)Stall Converter Required: Yes, 2800-3200RPM+Rear Gear Upgrade Required: Yes, 3.08 is the minimum suggestedWorks Well with Nitrous: No, designed for turbocharged applicationsWill Pass Most Smog Emissions: YesTurbocharger Size Recommendation: Single 72mm-76mm turbochargers and twin 58mm-62mm turbochargers. Heavier vehicles (4,000LBS+) using single 76mm-80mm turbochargers or twin 62mm-70mm turbochargers should highly consider this camshaft for added low-end torque. 4.8L engines with larger single 76-80mm turbochargers and twin 62mm-70mm turbochargers should highly consider this camshaft due to their smaller displacement and shorter stroke. This is the largest camshaft we recommend for a turbocharged 4.8L. Certain 4.8L racing applications may need more duration, but it is unusual for this size engine. If you're unsure what you need, please contact us directly. Our Tick Performance Turbo Stage 2 Camshaft for 4.8 & 5.3 liter engines is designed for those who want to make more power than possible with the Stage 1 camhaft and are doing so with a larger turbocharger. This camshaft is intended for use with single 72mm-76mm turbochargers and twin 58mm-62mm turbochargers. Those with 4.8 liter engines in lighter vehicles utilizing single 76mm-80mm turbochargers or twin 62mm-70mm turbochargers should highly consider this camshaft due to their smaller displacement and shorter stroke. Those with 5.3 liter engines in heavier applications (4000LBS+) utilizing single 76mm-80mm turbochargers and twin 62mm-70mm turbochargers should highly consider this camshaft for additional low end torque. Idle quality will be slightly rougher than stock with a noticeable lope. We strongly suggest the use of our Tick/PAC Dual Valvesprings and hardened pushrods with this camshaft (sold separately.) Hundreds of hours were spent developing this camshaft to perform precisely the way we advertise, so as a result, changes to the LSA or any other specification of this camshaft are not available.