Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Availability
CHEVROLET Chevy big block Mark IV Engine Blocks & Accessories
Showing In Stock Items. Show All 63 Items.
Not Showing Customizable Items. View Customizable Items.
Summit Racing™ SPC Engine Blocks
Summit Racing™ SPC Engine Blocks are aftermarket V8 Engine Blocks made for "Street, Performance, or Competition." These new clean sheet designed aftermarket blocks are cast in a modern state-of-the-art German foundry on brand new molds and machined in USA on modern high-speed machining centers that can hold the tightest of tolerances. Why start your engine build with a dirty, old, worn-out production block that needs hundreds or thousands of dollars of machine work--when you can start with a new heavy-duty casting full of high-performance features. We ship these blocks mostly finished but leave the cylinder bore .005" undersize, your machine shop will have to hone them for proper size. You can rest assured that you have a great foundation for your engine build. Check out the features below! Additional details: • Available Versions Include: GM Small Block, GM LS, GM Big Block (coming Soon,) Ford Windsor 5.0 and 351W • Cast in Germany at a Tier 1 OEM foundry • Made with class 35 Iron Alloy, Higher tensile strength and harder than competitors' class 30 • Machine-finished in USA on precision hi-speed machining centers- All dimensions are very accurate! • Priority main oiling systems & Siamese Cylinder bores • Blind head bolt holes • 4-bolt main caps, 180,00 PSI main bolts included
( 12 )
$3,399.99
Summit Racing™ Freeze Plugs
Our Summit Racing™ brass freeze plugs were designed for marine use, but you landlocked guys will get a lot of use out of them, too. All of the necessary plugs are included.
( 106 )
$30.99
ARP Main Stud Kits
ARP main stud kits help eliminate main cap walk/fretting and protect the threads in your engine block. They include studs made from 8740 chromoly steel and heat-treated in-house to 190,000 psi tensile-strength rating. The precision J-form threads are rolled after heat-treat for much stronger threads than the competition. Kits come complete with hardened parallel-ground washers and high-quality nuts. Add confidence in the strength of your engine build with the ARP main stud kit designed for your application.
( 394 )
$77.99
—
$171.99
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.
( 5 )
$19.34
Derale LS Engine Oil Cooler Adapter Kits
Derale LS engine oil cooler adapters are designed to give a non-thermostatic option to consumers with high performance LS engines. They feature -10 ORB inlet/outlet ports for maximum oil flow and are rated to flow up to 20 gpm. The adapters include two 1/8 in. NPT ports that can be used for additional accessories and or sensors.
( 3 )
$92.12
—
$184.27
ARP High Performance Series Main Bolts
ARP High Performance Series main bolts are rated at 180,000 psi and a popular premium replacement for OEM fasteners. Designed to meet the exacting standards and demands of professional engine builders, ARP bolts are forged from 8740 chromoly steel and feature a reduced wrenching head, large underhead radius, and rolled threads for the utmost in reliability. The threads are rolled after heat-treating which gives them about 2,000 percent better fatigue strength than most main bolts that are threaded prior to heat-treating. Hardened parallel-ground washers are included with each kit.
( 179 )
$46.99
—
$77.99
Summit Racing™ Mockup Replica Blocks
Summit Racing™ Mockup Replica Blocks are light-weight and ship disassembled for ease of shipping and storage. The individual panels are easily assembled with tabs and slots for superior rigidity and accuracy compared to bolt-together types. Steel resists the heat from welding, so custom motor-mounts can be fabricated right on the block.
( 16 )
$299.99
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.
( 170 )
$19.99
—
$27.99
World Products Merlin IV Engine Blocks
World Products has made improvements to virtually every area of the new Merlin IV engine blocks—with the goal of producing the most technologically advanced and best-performing iron BBC block available today! New features include thicker main webs for increased strength and thicker cylinder walls which are nominally .310 in. @ 4.600 in. bore. In addition to the standard BBC 9.800 in. and 10.200 in. deck heights, new heights measuring 9.500 in., 9.850 in. and 10.250 in. are now available. The World Products Merlin IV engine blocks are also available with a 2.120 in. BBC cam journal and standard .842 in. lifter bores, or with a 2.283 in. journal for a 55mm Babbitt cam and .904 in. lifter bores. World Products has added a front oil feed for dry sump systems, and relocated the lifter oil feeds and restrictor provisions to the front of the blocks.
( 3 )
$3,842.02
—
$5,173.48
Dura-Bond Flywheel Locating Dowel Pins
Dura-Bond flywheel locating dowel pins are OEM replacements for your crankshaft. If your locating dowel has seen better days, why not install a new one while you're swapping the flywheel or flexplate on your vehicle? Order the model recommended for your application.
( 10 )
$5.99
Pioneer Cylinder Head Dowel Pins
Pioneer offers quality new cylinder head dowel pins at an affordable price. These dowel pins are great to have on hand when you do machine work on your block. Pioneer cylinder head dowel pins are made with first-rate materials and are available in a choice of sizes for accurate cylinder head alignment.
( 58 )
$10.99
—
$49.99
Pioneer Timing Cover Dowels
Pioneer timing cover dowels make timing cover installation better. They're precision-machined from steel and help you align your timing cover with ease. The dowels are available for Chevy engine applications from the 1950s and up.
( 8 )
$11.99
Chevrolet Performance Bellhousing Dowel Pins
Chevrolet Performance bellhousing dowel pins allow you to easily align your transmission into the block. Correct alignment provides clean clutch release, while maximizing pilot bearing and transmission life. Chevrolet Performance bellhousing dowel pins also help to reduce shifter problems.
Not Yet Reviewed
$7.99
PRW Billet Steel Main Caps
PRW billet steel main caps raise the bar in the high performance industry. The main caps are precision-machined from high strength steel, which offers both the proper balance of strength and flexibility to allow transfer of increased shock loads to the crank and bearings. These main caps stabilize the entire crankshaft rotating assembly in your high-performance engine by eliminating annoying cap walk, and reducing main bearing bore distortion. With a combination of top-quality performance components and reasonable pricing, we know that when you receive your new PRW billet steel main caps, you will have no trouble seeing what the excitement is all about!
( 3 )
$207.03
—
$292.38
Moroso Fuel Pump Pushrods
Lightweight Moroso fuel pump pushrods feature hardened ends to reduce reciprocating mass, which prevents pump arm float and subsequent fuel starvation. They're ideal for use in drag, Oval Track, and street performance applications.
( 9 )
$36.99
Howards Cams Extreme Billet Main Caps
Howards Cams extreme billet main caps are precision CNC-machined from superior-quality low-carbon 1020 billet material. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. The splayed caps feature 10 degree angled outer holes to positively reinforce and tie the block together. Front, rear and center caps are all available. Use all the Howards Cams caps together for the ultimate in bottom-end stress and flex management. Howards Cams main caps feature side notches for easy removal and are proudly 100 percent manufactured in the USA. Line boring is required after installation.
( 14 )
$285.99
ACDelco Cylinder Head Pins
ACDelco cylinder head pins offer accurate alignment. The precise positioning of your cylinder heads prevents leaks and keeps your engine running efficiently. So, maintain the quality performance of your ride by utilizing cylinder head dowel pins from ACDelco in your build.
( 11 )
$3.99
Derale LS Engine Oil Cooler Block-off Adapters
Derale LS engine oil cooler block-off adapters can replace your stock GM adapter in order to furnish more 1/8 in. NPT ports. The two extra ports can be used for additional accessories and/or sensors. These block-off adapters are designed with an ultra-low profile to clear most header applications, and can withstand up to 200 psi.
Not Yet Reviewed
$57.92
Milodon Freeze Plug Kits
Milodon freeze plugs will not rot out, like lower cost steel ones. Your new engine assembly deserves the best. Don't get stuck trying to replace a leaking steel freeze plug behind a motor mount a year or two from now. Milodon freeze plug kits include all of the necessary external block freeze plugs, and cam and oil galley plugs for one complete engine.
( 48 )
$32.95
World Products PBM Performance Block Kits
World Products PBM Performance block kits are a great way to begin your next engine build. These kits contain accessory parts like freeze plugs, cam plugs, oil galley plugs, cylinder head dowels, timing cover dowels, and bellhousing dowels. With all the little parts assembled for you, it's time to get started! Kits are available for small block Ford or big block Chevy engine applications.
( 4 )
$30.67
PRW Billet Steel Main Girdles
PRW billet steel main girdles help eliminate the block flex and cap walk that occurs as a result of stress while under extreme loads, or during nitrous oxide power bursts in high performance engines. PRW main stud girdles are manufactured from premium quality 1045 billet steel, and include high-quality PRW fasteners and hardware. Select the girdle designed for your vehicle's engine.
( 2 )
$175.76
—
$239.37
Dura-Bond Bellhousing Dowel Pins
Dura-Bond offers bellhousing dowel pins in different lengths and diameters to help finish your build. The dowel pins simplify the task of placing the bellhousing in the engine block. Made from quality materials and precision-machined, these locating pins are solid and strong to do their job reliably—keeping your components in place. Order the sizes needed for your application.
( 16 )
$9.99
On Sale
Mr. Gasket Cylinder Head Dowel Pins
Why reuse your old dowel pins when you have machine work done on your block? I can't think of a good reason, especially when these Mr. Gasket dowel pins are inexpensive and readily available. They are made from high quality steel, precision machined and case hardened for accurate cylinder head alignment.
( 4 )
$17.19
—
$20.29
$9.69
—
$11.44
Dura-Bond Engine Hardware Finishing Kits
The engine tear down and cleaning process can lead to broken, bent, distorted, or lost service parts. These items can be troubling to any engine re-builder, especially when they are difficult to obtain. That is why Dura-Bond offers many of the hard-to-find OEM service parts you need. All hardware is manufactured to precise OEM dimensions for exact fit.
( 75 )
$12.99
