SBC 23° Pump Gas 540HP Top End Kit

Bolt it on. Turn the key. Hold on.

This is the top end for guys who want real power on real pump gas, not brochure horsepower and fairy dust. Designed to wake up your small block Chevy with 540 dyno-proven horsepower and a fat slab of torque, this kit is all business from idle to 6,000 RPM.

At the heart of the kit are 195cc as-cast 23° heads loaded with 2.055"/1.60" stainless valves, a 68cc chamber, and a competition 3-angle valve job. They’re decked for MLS gaskets and topped with 1.290" dual gold springs good for .650 lift, so they’re ready to party right out of the box. No guessing. No shortcuts.

Feeding the beast is The Rush dual-plane intake, featuring tuned runners and raised runner design to keep heat out of the charge and density where it belongs—inside the cylinder, not cooking in the valley. Translation: cooler air, better throttle response, and torque you’ll actually feel.

The cam? Oh yeah.
A Straub GTA hydraulic roller, dyno proven and street mean:

• .565/.548 lift

• 233/235 @ .050

• 108 LSA

This cam is why the kit cranks out 540 HP at 6000 RPM and 510 lb-ft at 4900 RPM—on 93 octane. Pump gas supremacy.

Matched with Morel retrofit hydraulic roller lifters, a Rolmaster billet timing set with Torrington bearing, and 1.6 aluminum stud-mount rockers, this combo is smooth, stable, and built to live.

To keep things simple (and sane), the kit includes all gaskets, ARP head bolts, and even a 12-point intake bolt kit—because nothing kills a build vibe faster than another parts order.

Highlights:

• 540 HP / 510 lb-ft on pump gas
• Works with OEM or aftermarket blocks—no mods needed
• Streetable, torque-happy, and dyno proven
• Requires 10:1+ compression and 93 octane (E10)

If you want a small block that idles with attitude, pulls hard everywhere, and makes big power without race fuel drama, this is your kit.

Basically: Bolt-on violence for your SBC.