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CP Performance Boaters Shopping and Product Info Guide
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Hardin Marine Valve Covers

hardin marine logoHardin Marine offers a complete line of valve covers and related accessories to suit a variety of racing and performance needs. Manufactured to exacting standards these valve covers perform just as good as they look! Rigid flanges ensure leak-free sealing, while their superior quality finishes will last long after the others have peeled and faded away. Compare these quality brands to any other brand and you'll quickly see the difference.

Click on the part number to check pricing or place an order.

Hardin Marine
"XS" Xtreme Series Valve Covers For Big Block Chevrolet

xtreme series valve covers

A number of companies have tried to copy this Hardin Marine cover by building sand cast copies. There's a difference if you look at their wavy, pin holed, porous covers you'll see that the Hardin Marine "XS" Xtreme cover is a beautiful die cast cover with no waves and no blemishes. So if you're looking for the best 1-piece cover this is it. This cover has been specially designed to fit marine Big Block Chevy engine with center rise exhaust. Angling one side of the cover helps to access the 2 lower center bolts while maintaining enough valve cover height to run roller rockers and stud girdles. One of the covers has a billet screw in -16AN oil fill.

Part No. Description
620-44000 Xtreme Series Valve Covers, Polished, 1 Hole Machined with Billet Oil Plug (pair)
620-44050 Xtreme Series Valve Covers, Polished with 3 Holes Machined, 1 with a Oil Plug, 2 for Breather Installation (pair)
620-44005 Stainless Steel Allen Bolt Kit for Hardin Xtreme Series Valve Covers
Hardin Marine
"XS" Xtreme Series Valve Cover System For Big Block Chevrolet

xs valve cover system

These start out as the awesome "XS" Xtreme series valve cover above except they have dual baffled tubes machined and welded into them. Then a K&N style breather is installed. This provides maximum crank case ventilation on high revving performance engines. One of the covers features a billet o-ringed screw in oil cap for fast access.

Part No. Description
620-45000 Xtreme Series Valve Cover System, Polished with 1 Billet Oil Plug, 2 Breather Extensions and Filtered Breathers Included (pair)
Hardin Marine
Chevrolet Finned Aluminum Valve Covers

finned valve covers

This traditional finned valve cover from Hardin Marine still today is one of our best selling favorites. This cover features enough height to run roller rocker arms while its smooth rounded edges clear center rise exhaust systems. These covers come in a polished finish but are available in a powder coated finish as an option. Available in blue red, purple, black, and yellow.

Part No. Description
620-70739 Big Block Chevy Valve Covers Polished (pair)
620-77739 Big Block Chevy Valve Covers Powder Coated (pair)

Hardin Marine
Aluminum Ford Valve Covers

aluminum valve covers

These are beautifully polished finned aluminum valve covers. The 460 version proudly displays the Hardin Marine logo. Hardin Marine engines have always been recognized as powerful performers.

Part No. Description
620-70750 Small Block Ford Windsor Valve Covers Polished (pair)

Hardin Marine
New Style H/P Valve Covers For Big Block Chevy

h/p valve covers

These polished original equipment hi-performance style valve covers are designed to replace those ugly black wrinkle-finished covers or just to update any hi-performance engine. Each cover has a built-in baffle and a provision for a chrome plated screw in oil cap. Each cover also has a provision for vent hose or PCV attachment.

Part No. Description
620-70000 Polished Late Style H/P Valve Covers (pair)
620-75000 Powder Coated Late Style H/P Valve Covers (pair)
620-70163 Chrome Screw-in Oil Cap
Hardin Marine
Chrome No Logo Valve Covers

chrome valve covers

These chrome plated steel valve covers feature a clean no-logo design. These are a great looking addition to any engine package. Not recommended in salt water applications. Sold in pairs.

Part No. Description
620-70705 New Style Small Block Chevy Center Bolt Mount Valve Covers
620-70712 Small Block Chevy Valve Covers
620-70742 Big Block Chevy Short Valve Covers
620-70751 302-351 Ford Windsor Valve Covers
620-70761 429-460 Ford Valve Covers
620-70798 350-455 Olds Valve Covers
Hardin Marine
Flame & Plain Valve Covers

valve covers

Here are two of the hottest new designs in custom valve covers for Big Block Chevrolet applications. Each set comes in a highly polished finish with either a plain or flamed version available. The valve covers will clear most stud girdles and roller rockers. The squared-off design may cause clearance issues with center-rise exhaust manifold systems, make sure to check available clearance before ordering. Baffle, breathers or caps are sold separately.

Part No. Description
620-70850 Plain Style Valve Cover (pair)
620-70855 Engraved "Flame" Style Valve Cover (pair)
Hardin Marine
Small Block Chevy Aluminum Center Bolt Valve Covers

s/b valve covers

Hardin Marine has introduced these new low profile valve covers for late model small block Chevy/GMC V-8's. The die cast covers fit 1987 and newer Chevy cylinder heads with center hold-down bolts. They are ideal for high performance power boats. The aluminum covers are available taller than stock. Unlike factory covers, the bolt towers are machined to clear roller rocker arms.

Part No. Description
620-70900 Stock Height S/B Valve Covers (2-9/16" tall with bolts)
620-70901 Tall S/B Valve Covers (3-11/16" tall with bolts)