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2003 Engine Blocks & Accessories

Part Groups

Results 1 - 24 of 29

Improved Racing Engine Block Oil Galley Barbell Plugs

Improved Racing's engine block oil galley barbell plugs feature a second O-ring that completely seals off the dirty oil from the clean oil, forcing 100 percent of the flow through the filter. Sharp corners were avoided and machined as smooth fillets to improve oil flow, while the bull nose tip helps smooth oil flow to the oil filter. The shaft diameter is smaller than the OEM plastic barbell to minimize flow restriction, and the threaded hole allows for easy removal with any 4mm x 0.7 threaded screw. Please refer to the Applications tab when ordering to confirm the fitment. Features of Improved Racing's barbell plugs include: * Direct replacement for plastic OEM barbell plug * Precision CNC-machined from billet 6061-T6 aluminum * Viton® rubber O-rings offer high-temperature resistance and excellent chemical compatibility with engine oils

5.0 out of 5 stars ( 17 )

$26.90

Summit Racing™ LS Rear Main Seal Housings

Summit Racing™ LS Rear main seal housings are the correct housings for all LS models. These aluminum housings are ideal for replacing damaged housings and building a new project from scratch. Summit Racing™ LS rear main seal housings are designed for a correct fit and quality performance.

2.35 out of 5 stars ( 17 )

$50.99

ICT Billet Oil Cooler Port Delete Plates

Need to cover up your oil cooler outlet? ICT Billet offers an ideal solution with their oil cooler port delete plates. These aerospace-grade billet aluminum delete plates come complete with a reusable O-ring seal and stainless bolts.

4.75 out of 5 stars ( 40 )

$23.99

Moroso Oil Galley Barbell Plugs

Replace a worn out or old rear oil passage plug with Moroso oil galley barbell plugs. Your vehicle's old plug could be allowing dirty engine oil to bypass the oil filter. Moroso's improved design features a secondary O-ring to seal dirty oil from flowing to the engine bearings. These dog bones also have a smaller shaft diameter than the OEM piece to minimize any flow restriction. Moroso's oil galley diverters are machined from billet aluminum, not plastic like the original OE piece, and are supplied with quality, high-temperature rated Viton® O-rings to withstand all types of engine oils and compression cycles. Whether you call them passage plugs, dog bones, or barbells, these Moroso components can be easily removed from the engine block once installed with its 4mm threaded hole.

5.0 out of 5 stars ( 4 )

$25.99

Derale Oil Galley Bypass Plugs

From the leader in performance cooling, Derale oil galley bypass plugs for Gen III and IV LS engines helps improve flow, oil pressure, and completely block dirty engine oil from bypassing the filter with a triple O-ring design. A direct replacement for the plastic OEM barbell plug, they are made from 6061 T-6 billet aluminum and black anodized. Derale plugs have three preinstalled Viton® O-rings and threaded #6-32 holes for easy installation.

4.5 out of 5 stars ( 4 )

$21.49

Summit Racing™ Oil Cooler Block-Off Plates

Cover your oil cooler outlet with Summit Racing™ oil cooler block-off plates. Our covers are machined from billet aluminum and are clear anodized for added durability and looks. They are available with or without ports and include mounting hardware.

5.0 out of 5 stars ( 6 )

$24.99

$25.99

ICT Billet Bellhousing Dowel Pins

ICT Billet bellhousing dowel pins are steel alignment pins offered in two lengths—factory and longer than factory. Made from mild steel, ICT pins fit between engine and transmission.

4.33 out of 5 stars ( 6 )

$22.99

Summit Racing™ LS Main Cap Bolt Kits

Rebuilding your GM LS engine? Replace those old main cap bolts with our Summit Racing™ LS main cap bolt kits for peace of mind. Our kit includes all 30 bolts to get the job done. They meet the same high-quality and specifications as your factory bolts.

4.67 out of 5 stars ( 15 )

$41.99

ICT Billet Camshaft Thrust Plate Bolts

ICT Billet camshaft thrust retainer plate bolts are high-quality replacements for your stock fasteners. If you're doing an engine rebuild, cam swap project, or maybe misplaced your stock bolts—why not upgrade with a premium set of camshaft thrust retainer plate fasteners from ICT Billet?

4.67 out of 5 stars ( 3 )

$25.99

Melling Freeze Plugs

Seal up the casting core holes in your engine block and heads with Melling freeze plugs. They're manufactured from a variety of quality materials—such as brass, steel, and stainless steel—and offered in different diameters and depths to fit your specific application. These expansion plugs help protect against cracks caused by the pressure of frozen coolant and in regular operation will ensure that all vital fluids stay in the engine, where they belong. They are available for a wide range of makes and models, and can be ordered individually or in a multi-piece kit.

4.57 out of 5 stars ( 164 )

$23.99

$24.99

Summit Racing Equipment® LS Engine Hardware Kits

Whether you're looking for more power or simply trying to refresh the motor, there will come a time when you'll need Summit Racing Equipment® LS engine hardware kits. These kits include brass freeze plugs and main cap side bolts for your LS engines. Your rebuilt engine will not be complete without Summit Racing Equipment® LS engine hardware kits.

5.0 out of 5 stars ( 2 )

$57.78

PRW Main Cap Side Bolts

PRW Main Cap Side Bolts uses premium grade Custom 4135 Steel rated at "aircraft" quality. Their side bolts are then specially heat-treated to 180,000 psi. This heat-treating procedure allows for total heat penetration which results in a stronger, more superior stud compared to lesser quality studs from other manufacturers. PRW main cap side bolts are then centerless ground after being heat treated and then thread rolled which assures better fatigue strength than having this process done before heat treatment. This manufacturing process may cost more to do but the results are well worth the extra effort.

Not Yet Reviewed

$25.98

Chevrolet Performance Oil Cooler Delete Plates

Chevrolet Performance oil cooler delete plates are designed to cover the oil cooler outlet. They're made from aluminum and are available for a variety of specific vehicle and/or engine applications.

4.55 out of 5 stars ( 11 )

$26.99

$46.99

Champ Pans Oil Pan Rail Girdles

Champ Pans oil pan rail girdles are engineered to help protect your vehicle from oil pan leaks. The pan rail girdles are precision cut to from steel to work with your oil pan, and are designed to spread the torque force over a larger area to seal the oil pan to the block, regardless of the gasket used. Minimize oil seepage with these oil pan rail girdles from Champ Pans.

3.89 out of 5 stars ( 9 )

$29.61

ARP Rear Motor Cover Fasteners

ARP rear motor cover fasteners are designed to attach the rear motor cover on your Chevrolet LS series engines. They are available in your choice of steel or stainless steel, and with either hex or 12-point fastener head styles.

5.0 out of 5 stars ( 3 )

$20.99

$39.99

Melling Engine Expansion Plug Kits

Melling engine expansion plug kits come with everything needed to replace the leaky "freeze" plugs on your current engine. When you have the motor out of the chassis, it's the ideal time to update the plugs before they start leaking. Order the kit recommended for your application—and stay ahead of the game with Melling!

4.33 out of 5 stars ( 12 )

$22.99

$31.99

Philadelphia Racing Products Oil Diverter Barbells

Philadelphia Racing Products oil diverter barbells are simple but effective. They replicate stock galley barbells, however the PRP components are made from solid 6061 aircraft-grade billet aluminum, precision machined, and fitted with an O-ring seal for leak-free performance.

2.75 out of 5 stars ( 4 )

$22.79

COMP Cams Engine Plug Kits

COMP Cams have put together their engine plug kits because they understand it's easy to forget the little things. Ordering this one part number will supply you with all the plugs needed to seal the water and oil chambers in your LS engine. The plugs are made from brass and galvanized steel to resist corrosion, and will last for years without rusting or becoming stuck in your engine block. When building an LS engine, your primary focus is the major components—camshafts, cylinder heads, and like power makers. You don't want to overlooked the smaller, but also important, parts to complete your build. COMP Cams hasn't; pick up one of these engine plug kits and be ready to finish what you've started.

5.0 out of 5 stars ( 2 )

$49.95

Ford Performance Parts Plug and Dowel Kits

When rebuilding your Ford engine, you'll want to use the proper plugs and dowels for the job. These Ford Performance Parts Plug and Dowel kits include the necessary dowels, cup plugs, and pipe plugs for your rebuild.

4.75 out of 5 stars ( 8 )

$39.99

$47.99

Pioneer Performance Freeze Plugs

These Pioneer performance freeze plugs are designed by engine rebuilders, for engine rebuilders. Several types of freeze plugs are offered in a choice of materials and sizes for a large variety of applications.

4.67 out of 5 stars ( 42 )

$35.79

Moroso Deck Plug Kits

Moroso deck plug kits are designed to reduce upper cylinder wall distortion. They install into the water passage holes in the deck of the block. The plugs will require the tapping of the water holes, and engine blocks will need to be decked after installation is complete.

5.0 out of 5 stars ( 1 )

$24.99

Mr. Gasket Freeze Plug Kits

Mr. Gasket brass freeze plug kits eliminate any chance of rusted-out engine expansion plugs. Though they're designed for marine applications, these kits are ideal for long-term stored vehicles, as well as for everyday street use. The plugs guard your engine against freeze damage and cracks when there is insufficient antifreeze protection. Each kit includes all of the plugs needed for a complete (and specific) engine block—for applications from 1955 and up.

Not Yet Reviewed

$31.46

Mahle Original Cylinder Head Dowel Pins

Mahle Original cylinder head dowel pins will keep gaskets in position and properly align cylinder heads to your engine block. Unfortunately, dowel pins are often overlooked when performing a rebuild or upgrading cylinder heads. Don't make that mistake—use Mahle cylinder head dowel pins for precise alignment and leak-free operation.

Not Yet Reviewed

$22.99

Cummins by Mopar Replacement Bellhousing Dowel Pins

Cummins by Mopar bellhousing dowel pins make perfect alignment possible. These pins will provide the right fit and function, so the install of your bellhousing will go easier. When working with your diesel build, Mopar offers all the parts—even the small ones—to make your job a success.

Not Yet Reviewed

$40.99

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