ATK 4.7L Inline 6 Baja Stroker Jeep Engine - HP87

universal fit logo


  • ATK NORTH AMERICA | Part Number: ATKHP87
  • Engine Configuration:L6
  • Engine Type:Long Block
  • Fitment:Universal Fit
  • Displacement:242


Produces 270 HP and 320 pound-foot torque. This is the engine combination that won the Baja 1000 for Team ATK. Other modifications may be needed (Injectors, Throttle Body, ECU, Exhaust ect.) Engine Type: AMC Straight 6 cylinder Displacement ( 242 Bore/Stroke: .040-.060 x 3.906 Crankshaft: Scat Nodular Steel Rods: OE 6.125" Pistons: Forged Dished Compression: 9.3:1 Rings: Moly Camshaft: Flat Tappet Camshaft Lift: lift .484 x .507 Camshaft Duration @.50:213x220 Cam Specs: 213/220 @50 .487in/.507ex 112LSA Cylinder Heads: Ported OE Cast Iron #0630 Rocker Arms: Harland Sharp Billet Aluminum Roller Recommended Fuel: 92 Octane + Max RPM: 5300 Warranty: 1 year/12,000 miles For your engine core return, the engine core needs only to be the same type as the ATK engine supplied, complete and with no visible damage and be able to turn over 360 degrees. Core pickup is easy. Place it in the crate and call the pickup number provided with the bill of lading. We pay the freight back. We will contact you after the sale for your vehicle VIN number, cylinder block and head casting numbers. **Retail price does not include the manufacturer core charge. A sales rep will contact you when your order is received regarding the core charge and availability.



Question & Answers

3 Answered questions

What about the transmission do I have to replace it with a different one sorry new to this trying to learn 93 Jeep Wrangler yj 4.0 lifted on 35s and lockers nothing else...

Asked by The yeti 101 from on

The ATK NORTH AMERICA 4.7L Baja Stroker Jeep Engine is a drop in replacement and requires no other modifications. Hope this helps!

Answered by Leon from on

1993 yj 4.0 ho i am getting ready to order this engine and need to know a few things. - What injectors/Throttle Body do you recommend - I currently use a spacer on the throttle body do I use this in this application. - Also use a Air-raid cold air intake system. Do i Use this - Have a Borla header and 3" exhaust is this sufficient

Asked by jeremy from Indiana on

Hello All of the parts you already have will work perfect with this motor. The injectors and throttle body are a big part of the performance. The throttle body we use is the Hesco unit part number HES 9199HFTB. There a lot of different injectors that work on the 4.0 / 4.7 motors. The most common injectors are the Bosch blue top 24 pound out of the 93 -94 Mustang.

Answered by Rody from Indiana on

I have a 2012 Wrangler Sport. Is it possible to put this in it and replace the V6 that came in it?

Asked by John from on

Hello John, the ATK NORTH AMERICA 4.7L Baja Stroker Jeep Engine could possibly fit your jeep with some fab work and creative wiring. As far as i know there are no direct bolt in kits though. Thank you for your inquiry.

Answered by mikey from on


As the largest private label crate engine remanufacturer in North America, ATK has been around for over 80 years producing parts including high performance engines, transmissions and rear axles. When your Jeep needs an engine rebuild, an ATK remanufactured engine uses reverse engineering processes to virtually eliminate factory defects that hinder performance. One reason ATK is at the forefront of engines is their adherence to thorough cleaning and inspection techniques and their machining and magnafluxing capabilities. If staying out of the garage and out on the trail is a priority, rely on ATK to get your 4x4 up and running. Shop ATK NORTH AMERICA Now