Advanced — 4+ hours
Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | JE Pistons |
| Part Number | J001 311969L |
Videos
How to identify your JE Pistons
LS 5.3L (Gen 4) Flat Top DROP-IN FORGED REPLACEMENT PowerPak Piston Set
Introducing the Strongest Pistons in Powersports | JE Ultra Series
A Better Way to Install Rods on Pistons
JE Pistons Asymmetrical Design Overview
Which SRP Piston is Right for You?
Installing Gen 4 pistons and rods in our 5.3 LS along with gaping the rings and Cam installation.
Piston Coatings 101: Which is the Right One for You?
![Why Forged Pistons Are BETTER Than Cast | JE Ultra Series Pistons [TECH TALK]](https://img.youtube.com/vi/89NtAeofjJw/hqdefault.jpg)
Why Forged Pistons Are BETTER Than Cast | JE Ultra Series Pistons [TECH TALK]
StreetLegalTV.com-JE Pistons with their latest LS series
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy