.40 over Stock and Large Bowl Pistons on Backorder til October 2022
Contact to Confirm Availability **Updated on 08/10/2022**
5.9L Cummins Overhaul/Rebuild kit featuring Mahle Pistons.
Please allow up to 2-3 business days before your kit ships.
Fly cut pistons will add 1-2 weeks to delivery time.
Coated Pistons will add approx 2 weeks to the delivery time.
These kits ship in MULTIPLE packages when they come.
No returns on coated or fly cut pistons!
We recommend that you have piston and bearing sizes confirmed by the machine shop before ordering. Any exchange on parts due to incorrect size will result in a 15% restock fee along with shipping both ways.
The stock bowls are identical to the stock pistons, while the larger bowl pistons are about 17.6:1 compression, stock is 17.9:1. We have had no reports of hard starting, etc with the larger bowl pistons, even in very cold climates.
*STOCK/MILD TRUCKS SHOULD USE OEM BOWL, THEY ARE BETTER SUITED FOR LESS THAN 500-600hp
THE LARGE BOWL PISTONS WILL REDUCE COMPRESSION TO AROUND 17.6:1* They are Mahle piston 224-3523 with the tapered tops.
Everything that is pictured is included.
ALL COMPONENTS WILL BE SUPPLIED FROM A COMBINATION OF THE FOLLOWING MANUFACTURERS:
Mahle, Clevite, Pefect Circle, Interstate McBee, and/or Cummins (High demand on these kits has been running the manufacturers out of stock from time to time so we have to substitute what is available........we do NOT supply products that we feel are inferior in quality/durability.
**Kits do NOT come with wrist pin bushings, please add them separately if needed...................these need pressed & burnished by a machine shop into the connecting rod.........typically these do not need replaced**
Picture depicts standard bore pistons.
2 different piston bowl styles are available. See picture, left depicts the smaller bowl pistons while the right depicts the larger (marine) style bowl.
THE TOP OF THE LARGE BOWL PISTONS ARE TAPERED IN OUR MACHINE SHOP TO AVOID STICKING.
We do not recommend re-using stock head bolts.
Wrist pin bushings are NOT included.
*All engine blocks 1997.5 & newer have "Storm" blocks. (these have 2 turbo oil return holes on the passenger side of the block)*, and have 12mm main studs instead of 14mm.
(Large Bowl) Mahle Piston Specifications
Related Part Number 1:
Piston Skirt Clearance:
Measure Skirt Clearance At:
0.472 from the bottom of skirt
Piston Pin Diameter:
Piston Pin Retention Type:
Pin Hole Location:
Head Type Description:
Reentrant Bowl Type Head
Compression Ring Groove 1:
3.00mm, this ring is 14MM down from the top of piston.
Compression Ring Groove 2:
Oil Ring Groove Width 1:
OE casting # 102O18
Keystone Top ring
We also Offer:
07.5-18 6.7L Common Rail Cummins Overhaul Kits, Click Here.
03-04 5.9L Common Rail Cummins Overhaul Kits, Click Here.
04.5-07 5.9L Common Rail Cummins Overhaul Kits, Click Here.
1998.5-2002 5.9L 24 Valve Cummins Overhaul Kits, Click Here.
1989-1993 5.9L 12 Valve Cummins Overhaul Kits, Click Here.
Piston Fairy Policy: We do not employ a "piston fairy" at Pure Diesel Power. Please take your block to the machine shop and have them measure what bore piston you need BEFORE placing your order. If you change your mind on your piston bore size AFTER your order has been processed & shipped you WILL be charged a restock/shipping fee.
Pistons that have been fly-cut or coated CANNOT be exchanged out for different size pistons.