JASPER® has been building engines and transmissions since 1942, and in that time we've learned a few things... like, how to get every inch of power out of our performance products. Our Class II performance crate engines are designed to bring your vehicle to the next level.

If your passion lies with street rods, muscle cars, racing, or a project vehicle somewhere in between, JASPER has the crate engine, transmission or a combination of both that will give you the performance you need and fit your budget. We will also build custom applications.

Here are some of the attributes of JASPER's Class II Performance Crate Engines:

Preparation and Machining Specifications

Thorough cleaning
Serdi three angle valve seat machining
Precise surface finish measuring
Machining of block surface
Main saddle align honing
Electronically balanced engine assembly
Torque plate honing
Computerized boring
Precision crankshaft machining, oil hole chamfering and polishing

Part Specifications

New high performance rod bolts and nuts
New high rev lifters and performance valve springs with retainers
New high volume oil pump
New double roller timing set
New harmonic balancer
New high performance bearings
New flat top hypereutectic pistons

Please visit our Literature Downloads section to get our Performance Brochure and our specification sheets, or Contact Us for pricing or for more information.

Proudly built in the U.S.A.

Class II Engines