
The Winning Edge: 602 & 604 Crate Engines from Karl Kustoms
When it comes to IMCA racing, the 602 and 604 crate engines are king. We've been working with these powerhouses for decades - both on the dyno and at the track - figuring out the perfect combination of bolt-on parts and tuning tricks to make these engines sing. We'll help you get the right package from the start, so you're not guessing.

The Dyno Process
If you want your crate engine drop-in ready when it arrives, our dyno service is your secret weapon. We can dyno your crate engine with your components before shipping so it arrives already working harmoniously with all of your accessories.
Alternatively, you can ship your carburetor and front-drive accessories to us, we'll run the engine with those items installed to ensure optimal performance with your existing components. If there are issues with any components we'll diagnose it on the dyno so you aren't wasting valuable track time troubleshooting.
Our dyno procedure is available for both the CT350 (602) and CT400 (604) and ensures your engine is dialed in with your parts before it leaves our shop:
- Complete engine break-in performed in controlled environment using proprietary dyno software.
- Champion brand break-in oil used exclusively.
- Valve lash is set before and after dyno service.
- Timing mark on balancer is set to true TDC (Top Dead Center).
- Ignition timing is optimized for peak performance.
- Oiling system is inspected for proper lubrication.
As an Authorized Retailer of GM Spec Sealed Race Motors and a Certified Chevy Performance and IMCA Repair Facility, we're your trusted source for getting your sealed crate engine repaired correctly and legally. Put yourself in victory lane with an expert team in your corner - give us a call today at 855-806-1147 to learn more.
602 & 604 Crate Engines
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602 Crate Engine – Chevrolet Performance CT350/602 Circle Track Crate Engine
$7,293.66 Select options -

602 Crate Engine – Chevrolet Performance Dressed CT350 602D2 Sealed Crate Engine Dyno-Tested
$8,133.66 Select options -

604 Circle Track Crate Engine – Chevrolet Performance 604 Circle Track Crate Engine
$9,809.19 Select options -

604 Crate Engine – Chevrolet Performance Dressed & Dyno-Tested CT400 604 Sealed Crate Engine (D2)
$11,128.24 Select options -

CT350 Crate Engine – Chevy Performance 602 IMCA-Sealed Crate Engine Dyno Tested (D1)
$8,033.66 Select options -

CT400 Crate Engine – Chevy Performance 604 Sealed Crate Engine Dyno Tested (D1)
$10,308.95 Select options
Common Accessories
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Jones Racing 1020-S Serpentine Drive Pulley Kit SBC Chevy V8
$332.19 Add to cart -

Kevko K-139 Aluminum EVAC Tank Kit 602 / 604 Crate Engines IMCA
$279.99 Add to cart -

MSD 64253 Black Digital 6AL Ignition Control
$364.95 Add to cart -

MSD 85555 Black Pro-Billet Distributor, Chevy V8
$399.95 Add to cart -

MSD 8727CT Digital Soft Touch HEI Rev Limiter, Circle Track
$254.95 Add to cart -

Sweet Mfg 305-85841 Bellhousing-Mount Tandem Power Steering & Fuel Pump Assembly
$1,224.99 Add to cart