ATK AMC 258 CID Inline 6 Cylinder Replacement Jeep Engine - DA21 |

ATK AMC 258 CID Inline 6 Cylinder Replacement Jeep Engine - DA21

universal fit logo


  • ATK NORTH AMERICA | Part Number: ATKDA21
  • Engine Configuration:L6
  • Displacement:258
  • Engine Type:Long Block
  • Fitment:Universal Fit


When you purchase an engine from ATK you can rest assured that you are buying something that is better than new quality. Why does ATK have better than new quality? Every engine that ATK remanufactures is reverse engineered to ensure that any original factory defects are removed, saving you time and money and keeping your car or light truck on the road and out of the shop. *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.

Customer Reviews

0.0 0.0
0 Customer ratings


Question & Answers

5 Answered questions

Q: My 1985 CJ7 has an OEM "Iron Duke" 150 4-cylinder motor. I am trying to price out all the necessary replacement parts I will need to swap out this engine with a 258. Is my OEM transmission compatible? Answer this question

A: Your best bet with engine swap questions is to call our sales team or ATK. A lot of factors and questions we have for you to make sure you get the correct parts Toll Free: 1-877-474-4821

Answered by Kelly from 4WP Corporate Headquarters on 02/11/2021

Q: What's the hp/tq and at what rpm? Answer this question

A: 115HP @3500 RPM; 210 lbs/ft TQ @2000 RPM

Answered by Kelly from 4WP Corporate Headquarters on 12/16/2020

Q: mechanical fuel pump compatible Answer this question

A: Hello Mike Yes it will take the stock type fuel pump. Thanks

Answered by Rody on 08/23/2015

Q: Does this motor accept the single serpentine belt system? Answer this question

A: Hello geoff, Yes, the ATK NORTH AMERICA AMC 258 Replacement Jeep Engine will accept a single serpentine belt system Thank you.

Answered by RK on 04/05/2015

Q: It says it has no oil filter check valve. Does it not need one? Answer this question

A: Thanks for the question Rob ATK NORTH AMERICA AMC 258 Replacement Jeep Engine ATKDA21, You are going to reuse the old oil filter check valve off your engine. Thank you BJ Answer Box Sales

Answered by RK on 08/28/2014


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