GMC Sierra 3500 HD Performance Engines

Designed to take advantage of the GM LS engine’s larger camshaft journal diameter, the XFI RPM camshaft line takes Xtreme Energy technology to deliver excellent power.

“This COMP Cams® HV NSR cam is designed for GM cathedral port 4.8L/5.3L/6.0L powered vehicles. It provides amazing drivability and throttle response while also requiring minimal tuning. Torque is increased across the entire operating range while still producing +69 horsepower at peak. Get the most out of your daily driver truck, SUV or 4×4 without sacrificing street manners. The NSR HV cam will provide a deep rumble with a mild, yet noticeable lope. At .541″” lift, this cam is designed to allow drop-in performance with stock valve springs. Also compatible with stock converters.”

HYDRAULIC ROLLER – XFI XE-R: High rpm street/strip with XE-R lobe designs. Requires custom tuning.

Competition Cams Hydraulic Roller Cam For Gm Ls Gen Iv With Vvt, 189-401-13.

“This Beehive Valve Spring Kit for LS engines is designed for hydraulic roller cams and includes carefully matched Beehive Springs, steel retainers, locks, seals and spring seats. With a .625″” maximum lift, these Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower and durability. The oval/multi-arc wire shape places the maximum area of the wire at the point of highest stress to handle valve train stress more efficiently and allow better heat dissipation for longer life.Kit Includes:26918-16 Beehive Valve Springs774-16 Steel Retainers623-16 7° Steel Valve Locks511-16 Valve Seals4705-16 Spring Seats”

“Competition Cams Valve Spring Kit, For Ls 1.310″” Beehive 1 Kt, 26915CS-KIT. ”

“With a .550″” maximum lift, these Beehive Valve Springs were designed for Ford 4.6L and 5.4L Modular 2 and 3 Valve engines. COMP Cams Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower and durability. The oval/multi-arc wire shape places the maximum area of the wire at the point of highest stress to handle valve train stress more efficiently and allow better heat dissipation for longer life. Because of the unique Beehive design, the valve train can handle more RPM and more aggressive cam profiles.”

COMP Cams Hydraulic Roller Lifters are a performance upgrade for stock hydraulic roller lifters or retro-fit hydraulic roller lifters for non-roller blocks. The roller wheel decreases friction and increases longevity when compared to flat tappet lifters. Hydraulic roller lifters can handle much more aggressive cam profiles than flat tappets unlocking performance potential.

Designed to take advantage of the GM LS engine’s larger camshaft journal diameter, the XFI RPM camshaft line takes Xtreme Energy technology to deliver excellent power.

Designed to take advantage of the GM LS engine’s larger camshaft journal diameter, the XFI RPM camshaft line takes Xtreme Energy technology to deliver excellent power.

HYDRAULIC ROLLER – XFI RPM Hi-Lift: Great street/strip camshaft for mid-range and high rpm power. Requires custom tuning.

Designed to take advantage of the GM LS engine’s larger camshaft journal diameter, the XFI RPM camshaft line takes Xtreme Energy technology to deliver excellent power.