Jeep 4.0L Stroker Kits

  • Comes with:
    KB Hypereutectic Dish Pistons -27.5cc #KB421
    Cast Piston Rings #E667
    Scat Enterprises 9000 Series Cast Steel Crankshaft 3.895” Stroke #9-4.2L-3895
    Connecting Rods 4.0L 242ci 6.125” Reconditioned
    King Connecting Rod & Main Bearing Set

    Compression ratios will vary depending on block deck height and gasket thickness. Please contact our customer service department for compression ratio options

    Core Charge Note: You have three connecting rod options with this kit (options are chosen after clicking "Add to Cart & Configure"):

    • Option #1 - Use the new connecting rods that come with the base kit. This option requires a refundable core charge. You will receive a return shipping label to ship your old connecting rods to us at no cost to you. Once your rod cores are received, we will refund the initial core charge.
    • Option #2 - Remove the connecting rods from this kit / use your old connecting rods. This option removes the need for a core charge and lowers the kit price.
    • Option #3 - Upgrade to SCAT 4340 forged connecting rods. This option removes the need for a core charge and increases the cost of the kit.

    ...Learn More

    $899.95

  • Comes with :
    Icon 4032 Forged Dish Pistons -27.5cc #IC668
    Cast Piston Rings #E667
    Scat Enterprises 9000 Series Performance Cast Steel Crankshaft 3.895” Stroke #9-4.2L-3895
    Connecting Rods 4.0L 242ci 6.125” Reconditioned
    King Connecting Rod & Main Bearing

    Set Compression ratios will vary depending on block deck height and gasket thickness. Please contact our customer service department for compression ratio options

    Core Charge Note: You have three connecting rod options with this kit (options are chosen after clicking "Add to Cart & Configure"):

    • Option #1 - Use the new connecting rods that come with the base kit. This option requires a refundable core charge. You will receive a return shipping label to ship your old connecting rods to us at no cost to you. Once your rod cores are received, we will refund the initial core charge.
    • Option #2 - Remove the connecting rods from this kit / use your old connecting rods. This option removes the need for a core charge and lowers the kit price.
    • Option #3 - Upgrade to SCAT 4340 forged connecting rods. This option removes the need for a core charge and increases the cost of the kit.

    Available kit upgrades / addons (selections available after clicking add to cart):

    • Upgrade to Hastings Moly Piston Rings +$30.00
    • Custom Autotec Forged Piston Option +$160 (custom pistons can be designed and built to any desired compression ratio and/or bore size)
    • Upgrade to Clevite Bearings +$60.00
    • Upgrade to Scat 4340 Forged Connecting Rods +$180.00
    • Balance Rotating Assembly +$130.00
    • 6- Fuel Injectors (24LBS) +$250.00

    ...Learn More

    $979.56

  • Comes with :
    Icon 4032 Forged Dish Pistons -21cc #IC944
    Cast Piston Rings #E667
    Scat Enterprises 9000 Series Cast Steel Crankshaft 3.895” Stroke #9-4.2L-3895
    Connecting Rods 4.0L 242ci 6.125” Reconditioned
    King Connecting Rod & Main Bearing Set

    Compression ratios will vary depending on block deck height and gasket thickness. Please contact our customer service department for compression ratio options. There is a $90.00 Refundable Core charge for the connecting rods, if we do not receive the rods back within 30 days you will be charged $90. There will be a return label to ship the rods back.

    Core Charge Note: You have three connecting rod options with this kit (options are chosen after clicking "Add to Cart & Configure"):

    • Option #1 - Use the new connecting rods that come with the base kit. This option requires a refundable core charge. You will receive a return shipping label to ship your old connecting rods to us at no cost to you. Once your rod cores are received, we will refund the initial core charge.
    • Option #2 - Remove the connecting rods from this kit / use your old connecting rods. This option removes the need for a core charge and lowers the kit price.
    • Option #3 - Upgrade to SCAT 4340 forged connecting rods. This option removes the need for a core charge and increases the cost of the kit.

    Available kit upgrades / addons (selections available after clicking add to cart):

    • Upgrade to Hastings Moly Piston Rings +$30.00
    • Custom Autotec Forged Piston Option +$160 (custom pistons can be designed and built to any desired compression ratio and/or bore size)
    • Upgrade to Clevite Bearings +$60.00
    • Upgrade to Scat 4340 Forged Connecting Rods +$180.00
    • Balance Rotating Assembly +$130.00
    • 6- Fuel Injectors (24LB) +$250.00

    ...Learn More

    $979.56

  • Comes with :
    Icon 4032 Forged Dish Pistons -10.8cc #IC945
    Cast Piston Rings #E667
    Scat Enterprises 9000 Series Cast Steel Crankshaft 3.895” Stroke #9-4.2L-3895
    Connecting Rods 4.0L 242ci 6.125” Reconditioned
    King Connecting Rod & Main Bearing Set

    Compression ratios will vary depending on block deck height and gasket thickness. Please contact our customer service department for compression ratio options

    Core Charge Note: You have three connecting rod options with this kit (options are chosen after clicking "Add to Cart & Configure"):

    • Option #1 - Use the new connecting rods that come with the base kit. This option requires a refundable core charge. You will receive a return shipping label to ship your old connecting rods to us at no cost to you. Once your rod cores are received, we will refund the initial core charge.
    • Option #2 - Remove the connecting rods from this kit / use your old connecting rods. This option removes the need for a core charge and lowers the kit price.
    • Option #3 - Upgrade to SCAT 4340 forged connecting rods. This option removes the need for a core charge and increases the cost of the kit.

    Available kit upgrades / addons (selections available after clicking add to cart):

    • Upgrade to Hastings Moly Piston Rings +$30.00
    • Custom Autotec Forged Piston Option +$160 (custom pistons can be designed and built to any desired compression ratio and/or bore size)
    • Upgrade to Clevite Bearings +$60.00
    • Upgrade to Scat 4340 Forged Connecting Rods +$180.00
    • Balance Rotating Assembly +$130.00
    • 6- Fuel Injectors (24LBS) +$250.00

    ...Learn More

    $979.56

  • Comes with :
    Sealed Power Hypereutectic Coated Dish Pistons -15.1cc #H825CP
    Cast Piston Rings #E667
    Scat Enterprises 9000 Series Performance Cast Steel Crankshaft 3.895" Stroke #9-4.2L-3895
    Connecting Rods 4.2L 258ci 5.875” New
    King Connecting Rod & Main Bearing Set

    Compression ratios will vary depending on block deck height and gasket thickness. Please contact our customer service department for compression ratio options

    Available kit upgrades / addons (selections available after clicking add to cart):

    • Upgrade to Hastings Moly Piston Rings +$30.00
    • Custom Autotec Forged Piston Option +$160 (custom pistons can be designed and built to any desired compression ratio and/or bore size)
    • Upgrade to Clevite Bearings +$60.00
    • Upgrade to ARP Connecting Rod Bolts +$90.00
    • Balance Rotating Assembly +$130.00
    • 6- Fuel Injectors (24LBS) +$250.00

    ...Learn More

    $901.23

Jeep 4.0L Add-ons

  • Jeep 4.0L Stage 1 Performance Camshaft Kit by Cleggs (CE-J4-CAM1)

    Jeep 4.0L Stage 1 Performance Camshaft Kit by Cleggs (CE-J4-CAM1)

    Available Kit Upgrades (Selections Available After Clicking Add to Cart)

    • Upgrade to Timing Kit
    • Add Fuel Injectors (24lbs | 252cc)
    Specs:
    Duration 263 Intake | 267 Exhaust 
    Duration @ 0.050 Valve Lift 209 Intake | 213 Exhaust
    Valve Lift 0.443 Intake | 0.443 Exhaust
    Kit Will Include:
    Camshaft, Lifters, Timing Set, Pushrods                                               

    ...Learn More

    $310.00
  • Jeep 4.0L Stage 2 Performance Camshaft Kit by Cleggs (CE-J4-CAM2)

    Jeep 4.0L Stage 2 Performance Camshaft Kit by Cleggs (CE-J4-CAM2)

    Available Kit Upgrades (Selections Available After Clicking Add to Cart)

    • Upgrade to Timing Kit
    • Add Fuel Injectors (24lbs | 252cc)
    Specs:
    Duration 269 Intake | 273 Exhaust
    Duration @ 0.050 Valve Lift 215 Intake | 219 Exhaust
    Valve Lift 0.484 Intake | 0.480 Exhaust
    Kit Will Include:
    Camshaft, Lifters, Timing Set, Pushrods, Valve Springs, Retainers,
    Valve Retainer Locks.

    ...Learn More

    $435.00
  • Jeep 4.0L Stage 3 Performance Camshaft Kit by Cleggs (CE-J4-CAM3)

    Jeep 4.0L Stage 3 Performance Camshaft Kit by Cleggs (CE-J4-CAM3)

    Available Kit Upgrades (Selections Available After Clicking Add to Cart)

    • Upgrade to Timing Kit
    • Add Fuel Injectors (24lbs | 252cc)
    Specs:
    Duration ??? Intake | ??? Exhaust
    Duration @ ???? Valve Lift ??? Intake | ??? Exhaust
    Valve Lift ???? Intake | ???? Exhaust
    Kit Will Include:
    Camshaft, Lifters, Timing Set, Pushrods, Valve Springs, Retainers,
    Valve Retainer Locks.

    ...Learn More

    $449.95

From the Blog

Dawson's Jeep Wins with Clegg Engine Rebuild

Congratulations to Dawson Allington of Baby Jeep Racing LLC for his 1st Place win at Ultra 4's Metal Cloak Stampede in Prairie City, California. Clegg Engine is proud to have performed the engine rebuild that helped propel Dawson into first place. The engine rebuild was completed for VP Racing in 2015 (previous owner). It has been winning races and running strong for three straight seasons.

Engine Specs:

  • Clegg Engine 4.7L Stroker Engine
  • Custom Forged Hi-Compression Pistons
  • Clegg's Secret Profile Camshaft
  • Heavily Ported Head w/ Oversized Valves
  • Scat 4340 Forged Connecting Rods
  • Scat Stroker Crankshaft
  • Harland Sharp Adjustable Roller Rockers
  • ARP hardware throughout.