Chevy 602 Crate Motor

Add 36 Horsepower to your ‘602 Crate Motor!

The stock ‘602 Crate engine produced 349 horsepower @ 6,000 rpm. With our “UnderCover Ported” heads the same motor made 363 horsepower @ 6,000 rpm. Torque also increased 18 ft.lbs at 5,500 rpm. Next, our Crate Master Camshaft was installed. With our Crate Master camshaft the motor made 385 horsepower @ 6,000 rpm. Torque increased another 9 ft. lbs at 6,000 rpm. The combination ofUndercover Ported” heads and Crate Master Camshaft improved the motor 36 horsepower and 31 ft. lbs of torque.

602 crate head with"UnderCover Porting".

“Undercover Porting” will add 14 horsepower & 18 ft. lbs. of torque. With our Crate Master Camshaft, the improvement is 36 horsepower & 31 ft. lbs. of torque.

The ‘602 crate motor has “Mexican” style Vortec cast iron heads. Of the several different styles of Vortec heads Chevrolet produced, the “Mexican” head is by far the worst flowing. However, they do respond to our “Undercover Porting” procedures.

We can modify your heads or supply complete new, “Under Cover Ported” heads assembled with our Look-a-Like parts.

Bulletproof your ‘602 Crate Motor Valve Train

Every racer who runs a ‘602 crate knows the valve train, especially the valve springs, are a real problem. The stock valve springs are to cheap and weak for circle track applications.

On the ‘602 crate motor, we are concerned about the valve spring pressure, or lack there of, on the intake valve. Why the intake valve and not the exhaust? Well, the intake valve is heaver and will “float” before the exhaust. Anything you can do to increase the effective valve spring pressure will help keep the intake valves out of this destructive “float” condition. The “intake valve float” condition is problematic because the stock Chevy ‘602 valve springs suck, especially if you are trying to run the motor over 5,800 rpm. 

Install our “Look-A-Like” valve springs, retainers and locks and you will not have to worry about valve float again.


Direct Drop-In replacement for the problematic stock spring. No shimming needed.

Look-A-Like replacement valve spring for the ‘602 Crate Motor. Same wire diameter, O.D. and installed height as the stock spring. While the stock springs last a few hundred laps, they will last a couple thousand laps.

#602SSS – 16 Look-A-Like springs $259.00


The stock Chevy retainers are made out of cheap low-carbon steel. Low-Carbon steel works for production street cars but is inferior for racing applications. Our chrome moly Look-A-Like retainer will not break.

#602R – 16 Look-A-Like retainers – $95.00

It is tough to take a good picture of valve locks. So, we don’t have one. But, we do have machined standard, -025″ & -.050″ Look-A-Like locks in stock.

#602L – 16 Look-A-Like locks – $65.00


18 horsepower gain vs. stock crate cam.

Our Crate Master camshafts are ground on original Chevy camshaft cores. The duration and lobe centers are changed; the valve lift is the same as stock.

New Crate Master Camshaft – $339.00


10 cfm air flow gain at .200″ & .300″ lift vs. the stock intake valve.

Look-A-Like intake valve for the ‘602 & ‘603 Crate Motor. Same look, length and weight as the stock intake valve.

#602-194 – 8 Look-A-Like intake valves – $160.00

Yes, we can rework your new or used ‘602 crate heads. Sending your heads to us has never been easier! If you don’t have good head boxes, we will send you some. If you do not have a place to ship them, we will send UPS to pick them up. Here is a link for more details on How To Ship Heads to Brzezinski Racing Products.

Modify YOUR Complete ‘602 Heads: We will take them apart, perform our “Undercover Porting”, surface & reassemble the heads with our “Look-A-Like” intake valves, valve springs, retainers and locks. Cost is $1,495.00 to totally rework YOUR complete ‘602 heads.

602 crate head, complete The same new Chevy castings that come on the ‘602 crate motor. They are “Undercover Ported” and assembled with our “Look-A-Like” valve springs, retainers, locks and intake valves. Ready to bolt on.

1 pair of complete heads, $2,195.00.

See also: Cylinder Head Resources