On our junkyard 5.3 with Trickflow 220 heads, BTR trinity intake and this cam we made 542 hp!

BTR LS3 STAGE 4 V2 CAMSHAFT 233/24X .636"/.636" 111 LSA

The V2 Stage 4 LS3 grind has been utilized on many max effort combinations with great success. We see 500+ whp with the addition of proper bolt-ons, while maintaining the durability you come to expect from BTR components. For proper piston-to-valve clearance, you cannot mill your cylinder heads without the possibility of needing to flycut your pistons. An aftermarket converter is a necessity for automatic applications. 

BTR PLATINUM LS DUAL SPRING KIT - .660" LIFT - SK001

The kit includes dual polished springs, locks, and Chromoly Steel Retainers •Locators for Stock or Bronze Guides •Valve Seals Spring specs are as follows: •155 lbs @ 1.780" •380 lbs @ 1.180" •400 lbs @ 1.130 •Coil bind @ 1.070"

BTR CHROMOLY ONE PIECE PUSHRODS - 5/16" DIAMETER - .080 WALL THICKNESS

These one piece precision formed pushrods are constructed from SAE 4130 chromoly tubing, centerless ground to exacting tolerances, and case hardened to Rc 60. Beware of competitors who say their pushrods are made from the same 4130 material, because some are not.