SHORT BLOCKS

From serious street performance to full race, we have what you need.

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Stage 1: 

(600-700hp/91 or 700-800hp/E85)

(Stock crankshaft and bored up to 97mm)

Teardown inspection and cleaning of the core

Wiseco® HD Severe Duty pistons

Eagle® 4340 rods

Magnafluxing, nitriding, and micro polishing of the crankshaft

Balancing of the rotating assembly

Rear main seal assembly

ACL® Race bearings

ARP® 8740 main studs

Resurfacing (decking) of the block

Boring and honing of the block (with a torque plate)

Assembly of the short block

Stage 2:

(800-900hp/91 or 900-1000hp/E85)

(Stroker crankshaft and bored up to 97mm)

3.86/3.99/4.26L displacement with a 97mm bore

Teardown inspection and cleaning of the core

HORU® Spec 4340 billet crank (87mm, 90mm, and 96mm strokes available depending on the application)

HORU® Spec CP Carrillo® Extreme Duty pistons

HORU® Spec 4340 billet rods

Mag and micro polishing of the crankshaft Balancing of the rotating assembly

Rear main seal assembly

ACL® Race bearings

ARP® 8740 main studs

Resurfacing (decking) of the block

Boring and honing of the block (with a torque plate)

Assembly of the short block

Stage 3: 

(900-1000hp/91 or 1000hp+/E85)

(Stroker crankshaft and sleeved for bores up to 100mm)

4.24/4.53L displacement with a 100mm bore.

Teardown inspection and cleaning of the core

Darton® M.I.D. sleeves (including installation)

HORU® Spec 4340 billet crank (87mm, 90mm, and 96mm strokes available depending on the application)

HORU® Spec CP Carrillo® Extreme Duty pistons

HORU® Spec 4340 billet rods

Mag and micro polishing of the crankshaft

Balancing of the rotating assembly

Rear main seal assembly

ACL® Race bearings

ARP® 8740 main studs

Resurfacing (decking) of the block

Boring and honing of the block (with a torque plate)

Assembly of the short block

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Stage 4:

(1500hp Extreme Boost)

(Stroker crankshaft and sleeved for bores up to 100mm)

4.24/4.53L displacement with a 100mm bore.

Teardown inspection and cleaning of the core

Darton® M.I.D. sleeves (including installation)

HORU® Spec 4340 billet crank (87mm, 90mm, and 96mm strokes available depending on the application)

HORU® Spec CP Carrillo® Extreme Duty pistons

HORU® Spec M300 rods

HORU® Spec 4140 billet main cap and girdle assembly on DE engines.

Mag and micro polishing of the crankshaft

Balancing of the rotating assembly

Rear main seal assembly

ACL® Race bearings

ARP® 8740 main studs

HORU® Spec ARP CA625™ 14mm head studs

Resurfacing (decking) of the block

Boring and honing of the block (with a torque plate)

Assembly of the short block

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Pistons

Our kits use two piston types: 

Wiseco® HD Severe Duty - for stock stroke builds and HORU® Spec CP Carrillo® Extreme Duty for all of our stroker builds. Both are forged from the same 2618 low silicon aluminum forgings used in extreme racing applications. Pistons built for our stroker kits utilize buttons instead of spring locks, providing additional support. These pistons integrate a gas expansion groove between the two ring grooves, allowing additional small, yet critical, volume for gas expansion. 

Eagle Rods - stock crankshafts only

Eagle Specialty is the largest and most respected aftermarket connecting rod and crank manufacturer in the industry. Eagle never stops researching ways to make their products lighter, stronger and more efficient to manufacture so you get the most for your money. Made from certified 4340 chromoly steel.

HORU Rods - for all stroker crankshafts

Designed in-house and manufactured from 4340 or M300 forgings. These materials were chosen for their strength and longevity. We recommend the 4340 forgings for horsepower levels up to 1000hp and the M300 for those applications over 1000hp.

Machining

All boring, decking, and sleeve installation Are performed with a 4-axis, fully programmable CNC Boring Machine that yields unprecedented precision that far exceeds OEM tolerances. The honing is performed with a honing machine that uses special coolant as a lubricant instead of oil. The coolant is cooled as it circulates through the machine, keeping the temperatures at acceptable levels while still lubricating. This prevents overheating and warping/expansion of the honed surface/cylinder seen with oil-based honing machines, yielding enhanced precision.

Head Studs

ARP® head studs are offered as an upgrade for every short block. The studs are manufactured from ARP2000™ material and are rated at 200,000 psi tensile strength.

Our HORU® Spec ARP® 14mm head studs are designed with an increased diameter for greater holding strength and made from ARP CA625™ material rated at 260,000 - 280,000 psi tensile strength. These are the best choice for highly boosted engines pushing over 1000hp.

Options for additional costs

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Head studs

M11 ARP 2000

M11 ARP L19

M14 ARP CA625

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Piston coatings

Ceramic

Molybdenum