Pre-Order Jormungandr - long rod 372xp to 390xp piston

Pre-Order Jormungandr - long rod 372xp to 390xp pistonThis is the new 372 to 390 upgrade piston that Mark designed to utilize an OEM 592xp rod for the ultimate big torque in a small chassis works or races, depending on how it is built. Check out his videos on the origin of this design on his YouTube channel here: https: youtu. be YcpZ IkTp Msi=JoAY2BOOS6SKNrYl https: youtu. be tRThfyG0urAsi=SsjBgBtBFq6EBiuX https: youtu. be Nk7YLc_SN 4? si=yuTFj7DT220TuX3B This model will use a modified 372xp crankshaft

This is the new 372 to 390 upgrade piston that Mark designed to utilize an OEM 592xp rod for the ultimate big torque in a small chassis works or races, depending on how it is built.

Check out his videos on the origin of this design on his YouTube channel here:

https://youtu.be/YcpZ-IkTp-Msi=JoAY2BOOS6SKNrYl

https://youtu.be/tRThfyG0urAsi=SsjBgBtBFq6EBiuX

https://youtu.be/Nk7YLc_SN-4?si=yuTFj7DT220TuX3B

This model will use a modified 372xp crankshaft with a 592 xp rod.

This build should be considered Expert Level, it is involved and should result in a Monster.

Design specs were submitted to Wiseco on March 23rd, 2026.

Updates will be posted here as we get them from Wiseco, including anticipated finished weight.

This design uses a tapered OEM Stihl piston Pin (the lightest and strongest available), a 1mm Japanese NPR ring and Wiseco circlips.  The ring and circlips are included, the pin is NOT, but can be ordered from us separately if needed.  The rod is sold separately and we will list it as an item shortly.

Full Price:   $188.45

Pre-order Deposit: $25.00

Balance:  $163.45 +$5.00 shipping in the USA.

How it works - you order and pay the pre-order for each piston you intend to buy ($25), when we get the design print and specs from Wiseco they will be posted here.  The number of pre-orders will let us know if we need to increase our order size before they manufacture the pistons.  When the pistons are ready to ship to us, we will send all of the pre-order customers an e-mail letting them know it is time to pay the balance.  That should give everyone a few days or so to get paid up so that when the pistons arrive, we can inspect them and ship them out within a day or two of getting them.  If we work the timing right, you should be able to watch the next series of videos on the Dragon Build with your freshly forged piston in hand.

USA shipping will be a flat rate $5 on the Balance, no shipping on the pre-order.  I will figure out a price on the Canada shipping as time gets closer bu tit will be similarly inexpensive.  For any other non US/Canada customers, send me an e-mail to [email protected]. and we will try to get you figured out, I will not be allowing open international orders.  please do not wait to the last minute for international requests, so I have time to create a specific listing for you with a good shipping price.

please note: Pokemon card not included