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![1001557 AutoTec II Forged Flat Top Piston Set for Mopar Gen III Hemi 5.7L Engines [3.937 in. Bore]](https://www.jegs.com/images/mini_750/600/613/613-1001557.jpg)
Vehicle Info NeededRACETEC PISTONSPART NUMBER: 613-1001557
1001557 AutoTec II Forged Flat Top Piston Set for Mopar Gen III Hemi 5.7L Engines [3.937 in. Bore]
$87930$977.00You Save$97.70
Ships on 10/12/2026
Lowest Price GuaranteeAutoTec II Forged Piston SetMopar Gen III Hemi 5.7L 3.937 in. Bore Forged 2618 Aluminum 3.795 in. Stroke 6.125 in. Rod Length 1.230 in. Compression Height -6.6 cc Crown Volume 1.2 x 1.2 x 3.0 mm Ring Grooves Set of 8
RaceTec 1001557 AutoTec II Flat Top Piston Set Specs:
- Engine Family: Mopar Gen III Hemi 5.7L
- Displacement Reference: 370 cu. in. (6.1L)
- Bore: 3.937 in.
- Stroke: 3.795 in.
- Rod Length: 6.125 in.
- Compression Height: 1.230 in.
- Crown Volume: -6.6 cc
- Piston Style: Flat Top w/2 Valve Reliefs
- Alloy: 2618
- Wrist Pin Diameter: 0.927 in.
- Ring Grooves: 1.2 mm Top, 1.2 mm Second, 3.0 mm Oil
RaceTec 1001557 AutoTec II Flat Top Piston Set Notes:
- Compression Ratios:
- 10.5 @ w/65 cc Heads
- 9.5 @ w/74 cc Heads
- 8.5 @ w/85 cc Heads
Part TypePiston
BrandRACETEC PISTONS
Package Height6.0
Package Width12.0
Package Length12.0
Weight12.0 PG
Part CategoryPerformance Parts
Pin Lock Rings IncludedYes
Compression Height (In)1.23
Bore (In)3.937
Wrist Pin StylePress or Full Floating
QuantitySet of 8
Piston Head Volume-6.6
Engine Make/SizeMopar Gen III Hemi
Piston StyleFlat Top
Compression Ratio65cc-10.5, 74cc-9.5, 85cc-8.5
Ring Thickness1.2 x 1.2 x 3.0 mm
Piston Material2618
Pin Diameter (In)0.927
Part FitmentSemi Universal
Wrist Pin IncludedYes
Snap Rings IncludedYes
Vendor Part Number1001557
Package Qty1
Package TypeEA
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