JE Pistons · New
JE Pistons Ultra Series GM Gen III/IV LS 4.07in Bore/4in Stroke Set of 8 Pistons
MPN 360778 · Store SKU jep360778
Supplier stock checked 11/7/2026, 9:31:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Ultra Series forged pistons from JE are the industry’s strongest, most fully featured pistons available off the shelf. Offered for LSX 12 and 15 Degree Engines. Ultra Series Pistons feature JE’s proprietary Aligned Grain Flow forging technology providing next-level tensile strength ideal for the extreme cylinder pressures of power adder engine builds. Equipped with the following custom level features Accumulator Groove, Double Pin Oilers, Pin Fit, Thermal Crown, Lateral Gas Ports, and Skirt Coat. Ultra Series pistons are made 100% in the USA. Piston Set, 2618, Inv Dome/Dish, 4.070 Bore, 1.115 CD, 0.927 Pin, Set of 8. 4.070 in. Bore - 1.115 CD - Dome - (15.10 cc) - 8 Cyl. Piston Kit
Manufacturer fitment & guides
Check 360778 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y
