Racing Engine Blocks & Components
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RHS®LS Race Bare Engine Block (54901)LS Race Bare Engine Block (54901) by RHS®. Engineers at RHS® have designed a high-performance aluminum engine block for GM LS applications to meet the needs of race and street performance engine builders alike. Additionally, this...Rolled threads on all threaded holes for added strengthGen III/Gen IV compliant with race mounts for Gen I, Gen II, Gen III & Gen IV engines$5,268.60 - RHS®LS Race Bare Engine Block (54901U)LS Race Bare Engine Block (54901U) by RHS®. Engineers at RHS® have designed a high-performance aluminum engine block for GM LS applications to meet the needs of race and street performance engine builders alike. Additionally, this...Rolled threads on all threaded holes for added strengthGen III/Gen IV compliant with race mounts for Gen I, Gen II, Gen III & Gen IV engines$6,575.95
- RHS®LS Race Bare Engine Block (54903U)LS Race Bare Engine Block (54903U) by RHS®. Aluminum Engineers at RHS® have designed a high performance aluminum engine block for GM LS applications to meet the needs of race and street performance engine builders alike. To go beyond...Rolled threads on all threaded holes for added strengthGen III/Gen IV compliant with race mounts for Gen I, Gen II, Gen III & Gen IV engines$6,575.95
- RHS®Main Cap Dowel Pin (549201-1)Main Cap Dowel Pin (549201-1) by RHS®. Designed utilizing the latest technology, this product by RHS features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$8.95
- RHS®Main Cap Long Stud (549300-1)Main Cap Long Stud (549300-1) by RHS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$21.95
- RHS®Main Cap Short Stud (549301-1)Main Cap Short Stud (549301-1) by RHS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$21.95
- RHS®Race Block Dowel Pin (549205-1)Race Block Dowel Pin (549205-1) by RHS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.95
- RHS®Rear Main Seal (549101)Rear Main Seal (549101) by RHS®. Designed utilizing the latest technology, this product by RHS features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or...Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability$224.95
- RHS®Tall Deck Race Solid Aluminum Engine Block (54908U)Tall Deck Race Solid Aluminum Engine Block (54908U) by RHS®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$5,765.39
- Replace®383 Stroker Race Series Engine Short Block (SP35)383 Stroker Race Series Engine Short Block (SP35) by Replace®. Bullet proof bottom end built to handle more power with its top of the line stroker kit. This short block is built with a mild compression ratio great for easy tuning on...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$4,265.35
- Replace®540 Dart Race Series Engine Short Block (SP44)540 Dart Race Series Engine Short Block (SP44) by Replace®. This short block has fully forged rotating assemble, and Dart block it will hold big power reliably. This short block is built with a mild compression ratio great for easy...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$7,142.37
- Replace®Engine Short Block (SP41-1P)Engine Short Block (SP41-1P) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no warranty as there is more room...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,393.10
- Replace®Engine Short Block (SP98)Engine Short Block (SP98) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no warranty as there is more room...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,137.11
- Replace®Engine Short Block (Chrysler New Hemi V8) (SP97-B)Engine Short Block by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no warranty as there is more room for error...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,764.40
- Replace®High Performance 393 Stroker Engine Short Block (SP17)High Performance 393 Stroker Engine Short Block (SP17) by Replace®. Great foundation for street machine or cruiser, built with high quality parts for durability. This short block is built with a mild compression ratio great for easy...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$4,028.83
- Replace®High Performance 408 A Stroker Engine Short Block (SP61)High Performance 408 A Stroker Engine Short Block (SP61) by Replace®. This short block is designed to be a strong foundation for high horsepower street/ strip engine builds. This short block is built with a mild compression ratio great...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$3,458.18
- Replace®High Performance LS 370 Engine Short Block (SP93-G4)High Performance LS 370 Engine Short Block Gen IV (SP93-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$4,957.22
- Replace®High Performance LS 370 Engine Short Block (SP95-G4)High Performance LS 370 Engine Short Block Gen IV (SP95-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$4,957.22
- Replace®High Performance LS 370 Engine Short Block (SP94-G4)High Performance LS 370 Engine Short Block Gen IV (SP94-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$4,957.22
- Replace®High Performance LS 370 Engine Short Block (SP96-G4)High Performance LS 370 Engine Short Block Gen IV (SP96-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will be no...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$4,957.22
- Replace®High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block (SP37-G4-B)High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block Gen IV (SP37-G4-B) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,931.60
- Replace®High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block (SP32-G4-B)High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block Gen IV (SP32-G4-B) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,931.60
- Replace®High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block (SP31-G4-B)High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block Gen IV (SP31-G4-B) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,931.60
- Replace®High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block (SP38-G4-B)High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block Gen IV (SP38-G4-B) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,931.60
- Replace®High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block (SP36-G4-B)High Performance LS 408 LQ9 Boost/Nitrous Engine Short Block Gen IV (SP36-G4-B) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,931.60
- Replace®High Performance LS 408 LQ9 Engine Short Block (SP38-G4)High Performance LS 408 LQ9 Engine Short Block Gen IV (SP38-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,568.36
- Replace®High Performance LS 408 LQ9 Engine Short Block (SP37-G4)High Performance LS 408 LQ9 Engine Short Block Gen IV (SP37-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,568.36
- Replace®High Performance LS 408 LQ9 Engine Short Block (SP32-G4)High Performance LS 408 LQ9 Engine Short Block Gen IV (SP32-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,568.36
- Replace®High Performance LS 408 LQ9 Engine Short Block (SP26-G4)High Performance LS 408 LQ9 Engine Short Block Gen IV (SP26-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,568.36
- Replace®High Performance LS 408 LQ9 Engine Short Block (SP31-G4)High Performance LS 408 LQ9 Engine Short Block Gen IV (SP31-G4) by Replace®. This short block is built with a mild compression ratio great for easy tuning on pump gas or running a small shot of nitrous. If used with nitrous there will...Reverse engineered to ensure any factory defects are eliminatedDyno proven horsepower gains$5,568.36
An engine block is the base for all major powertrain components including a cylinder head, transmission, etc. Meant to withstand huge thermal and mechanical loads, the blocks are designed according to the expected power, stresses, and durability. Racing engine blocks are designed mainly for those who want to squeeze more horsepower from their vehicles. In general, the main difference between racing motors and their factory counterparts is greater strength, higher performance, ability to work at much higher RPMs, and some specific possibilities you may need to adapt the motor to your requirements.
For instance, you may want to increase the bore diameter, change the stroke length, install roller cam bearings, choose between the wet or dry sump, and so on. While building a racing engine, much attention is devoted to the material; often, it's lightweight and strong aluminum with steel sleeves and main caps. Some manufacturers intentionally leave steel sleeves slightly protruding above the deck of the block, providing a so-called stepped deck option, an alternative to a wire O-ring meant to increase the seal pressure around the cylinder.
Besides, racing engine blocks are designed and built according to the highest precision requirements, using the most accurate honing and controlling clearances in all crucial areas. Also, aftermarket manufacturers find and eliminate pretty much any potential weak points of the stock motors, which usually appear when the factory powerplant is heavily loaded and/or operates at high RPM. A performance crankshaft is made ideally balanced, oil passages and holes are reconsidered to provide sufficient lubrication in all working modes, the piston design can vary to match specific applications, and so on. There are many methods developed in the racing environment throughout the years, and our online store is ready to supply you with high-quality racing engine blocks and related components using the finest technical solutions.
