SRP Professional pistons combine durability, technology and performance. Forged from 4032 aluminum, they have minimal thermal expansion making them perfect for a high-performance daily driver or street/strip application. All SRP Pro pistons include premium ring sets, wrist pins and locks.
- Piston Head Type:
- Flat Top
- Bore (in.):
- 4.155
- Recommended Stroke (in.):
- 3.875 in.
- Piston Style:
- Flat top, with two valve reliefs
- Compression Height (in.):
- 1.062 in.
- Piston Volume (cc.):
- -5
- Piston Material:
- Forged aluminum
- Piston Avg Weight (g.):
- 395
- Quantity:
- Sold as a set of 8.
- Wrist Pin Included:
- Yes
- Wrist Pin Style:
- Press-fit or floating
- Piston Pin Diameter (in.):
- 0.927
- Wrist Pin Retainers Included:
- Yes
- Piston Pin Wall Thickness:
- 0.15
- Piston Pin Material:
- 5115
- Piston Pin Length:
- 2.250
- Piston Rings Included:
- Yes
- File Fit:
- No
- Gas Ported:
- No
- Gapless:
- No
- Notes:
- Oil rail supports included.
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen I
- Engine Sizes:
- 6.6L/400
- Years:
- 1970-1980
- Recommended Rod Length:
- 6.000 in.
- Application Notes:
- 421 cubic inch applications
- Cylinder Head:
- Chevrolet 23 Degree 20/30
- Top Ring Thickness:
- 1.200 mm
- Second Ring Thickness:
- 1.50mm
- Oil Ring Thickness:
- 3.00mm
