IC736KTD.040 ICON Premium Forged Pistons & Ring Set for Small Block Ford Windsor Engines [4.040 in.]

Name: IC736KTD.040 ICON Premium Forged Pistons & Ring Set for Small Block Ford Windsor Engines [4.040 in.]
Brand: UNITED ENGINE MACHINE
SKU: 648-IC736KTD.040
Price: 893.52 USD
Availability: InStock

^$893⁵²

Ships on 11/03/2026

Lowest Price Guarantee

Ford 289 / 302 / 393ci

Dome Top Pistons

ICON Premium Forged Pistons & Ring Set

Ford Small Block V8 Windsor

Solid Dome w/2 Valve Reliefs

Bore: 4.040 in.

Stroke: 3 in.

Rod Length: 5.155 in.

Compression Height: 1.608 in.

Piston Head Volume: -6.80 cc

Set of 8 w/Rings

UEM IC736KTD.040 ICON Premium Forged Pistons & Ring Set Includes:

IC736.040 Forged ICON Piston Set:
- Bore: 4.040 in.
- Stroke: 3.000 in.
- Rod Length: 5.155 in.
- Piston Style: Dome
- Piston Material: Forged Aluminum
- Compression Height: 1.608 in.
- Dome Height: .150 in.
- Piston Head Volume: -6.80 cc
- Wrist Pin Style: Press-Fit or Floating
- Wrist Pin Retainers Included: Yes
- Wrist Pin Included: Yes
- Pin Diameter: .912 in.
- Piston Ring Thickness: 1/16 in. x 1/16 in. x 3/16 in.
- Set of 8
4000BD8.045 Plasma Moly File Fit Piston Ring Set:
- File Fit: Yes
- Gapless: No
- Top Ring Thickness: 1/16 in.
- Top Ring Material: Ductile iron
- Top Ring Facing Material: Plasma-moly
- Second Ring Thickness: 1/16 in.
- Second Ring Material: Iron
- Second Ring Facing Material: Cast iron
- Oil Ring Thickness: 3/16 in.
- Oil Ring Material: Stainless steel
- Oil Ring Tension: Standard
- Set of 8

Ford Small Block Windsor Based Pistons

United Engine and Machine Company is proud to introduce the Icon line of forged pistons. Icon brings the same quality and performance you've come to expect from other United Engine brands while adding a new lightweight forged design. No matter your high performance application, there is an Icon piston for you.

Features:

High ductility 2618 alloy
Perfect for Nitrous, Turbocharged and Supercharged Apps
Dual forced pin oiling on most applications

Lateral gas porting on higher compression ratios
Fully machined with deep valve pockets
Second land accumulator grooves
Top land mini groove technology
Diamond finished skirts
Triple wound spiral locks
Spacer rings included in short compression heights that intersect the wrist pin bore
Sold in Sets (except when noted as 1 piston per package)

Click here for reference guide to piston top designs

Part TypePiston

Product LineUEM Pistons Icon Premium Forged Series Small Block Ford Pistons

BrandUNITED ENGINE MACHINE

Package Height5.6

Package Width10.0

Package Length22.4

Weight15.65 PG

Part CategoryPerformance Parts

Pin Lock Rings IncludedYes

Compression Height1.608 in.

Top Ring IncludedYes

Piston Ring Thickness (In.)1/16, 1/16, 3/16