Our Budget Street Short Blocks for 4.6 engines are an economical way to add durability and horsepower to your vehicle. These short blocks include: BRAND NEW 4.6 Romeo engine blocks, Forged 4340 Steel 8 bolt crankshafts (check your flywheel for fitment), ModMax Forged 5140 Steel connecting rods, your choice of Manley Forged and coated pistons and pins, Plasma Moly rings, and High Performance King rod and main bearings. These short blocks are rated up to 550hp with the ACE rods but with the upgraded ModMax rods (up to 600hp) or ACE H-Beam rods (up to 750hp) these blocks can take a lot more. (See the optional rod choices to get the ones you prefer for your application.) In addition we can build these with a variety of piston dish volumes for the compression ratio of your choice. (Please use the compression ratio chart below to see which pistons to choose for your compression decision and then pick the proper pistons in the dropdown box).

 

Each shortblock is hand assembled and machined as ordered to insure quality. The blocks are precision honed for proper piston to wall clearance, checked and cleaned before assembly. The rotating assemblies are completely internally balanced to racing specifications and then meticulously assembled into the block. Bearing clearances are checked and set for performance use and the rings are perfectly filed to fit for optimum seal. If you choose the main stud option we also install the main studs and line hone for a perfect crank bore as studs change the roundness of the main saddles.

 

NOTE: PLEASE SEE THE CHART BELOW FOR COMPRESSION RATIO OPTIONS SO YOU CAN CHOOSE THE CORRECT PISTONS!