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ATK 4.7L Baja Stroker Jeep Engine - HP86

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  • ATK NORTH AMERICA | Part Number: ATKHP86
  • 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 #686 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.



Question & Answers

4 Answered questions

I have a 87 wrangler with a automatic transmission a/c p/s p/b. It is a old Oklahoma Police vehicle. It has a 4.2 258. The vin# is a special number issued to police vehicles. I am hoping this engine will be a direct fit for the trans and motor mounts?. Thanks for your time.

Asked by T from Acton, Ca on

Hi T I will need the VIN to verify it with ATK about the 4.7L Baja Stroker Jeep Engine fitting properly and availability at this time. Thanks

Answered by LWiff ext 4804 from Acton, Ca on

According to website this is a direct replacement for 87-90 wranglers(4.2 motor), but it says it replaces the 4.0 that came in wranglers in 1991 and after, can we get clarification on which Head it uses.

Asked by DDTR from on

Hi DDTR The 4.7L Baja Stroker Jeep Engine fits 1987-1990 only and has the 686 head on it. Thanks

Answered by LWiff ext 4804 from on

Is this a brand new engine or a rebuild?

Asked by Connor from on

Hey Connor, this is a rebuild. Thanks for your question.

Answered by Devin B. ext 4835 from on

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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