{"product_id":"gt21-ls-series-hydraulic-roller-camshaft","title":"GT21 LS Series Hydraulic Roller Camshaft","description":"The Lingenfelter GT21 LS Series Camshaft is a high-performance hydraulic roller camshaft engineered for LS7 and other GM Gen III \u0026amp; IV V8 engines, excluding those with Displacement On Demand (DOD) or camshaft phaser systems.\n\nThis camshaft boasts a 243\/259 duration at .050 lift and .691\/.702 lift with a 1.8 rocker, and a 112 lobe separation angle. It is manufactured from induction-hardened steel cores, ground to Lingenfelter specifications by Competition Cams for exceptional durability and longevity. Extensive engine dyno testing has resulted in a camshaft profile optimized for street use in 427 CID LS7 Z06 Corvette applications, particularly those with a six-speed manual transmission.\n\nThe GT21 series camshaft is designed to deliver excellent power gains and a noticeable idle, making it a popular choice for daily-driven C6 Corvette Z06 models and is included in Lingenfelter's LS7 660 HP engine packages. While it may exhibit some drivability challenges at lower RPMs, it can also be successfully implemented in other 427 CID LS7 cylinder head and intake setups. For automatic transmission applications, a loose torque converter is recommended.\n\nCrucially, spring and retainer upgrades are mandatory when installing this camshaft to ensure proper operation and prevent damage. The camshaft can be installed in stock LS7 engines without requiring piston modifications. The standard GM V8 firing order of 1-8-7-2-6-5-4-3 applies.","brand":"Lingenfelter","offers":[{"title":"Default Title","offer_id":52686628847928,"sku":"L210146006","price":417.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/657807409.jpg?v=1784875448","url":"https:\/\/store.motormia.co\/products\/gt21-ls-series-hydraulic-roller-camshaft","provider":"MOTORMIA","version":"1.0","type":"link"}