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ALWAYS SECURE
America's Oldest Speed Shop ® 800.979.0122 Lincoln, NE
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800.979.0122

(CST) 7am - 10pm

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Icon Chevy 421 Forged Pistons, Flat Top, 6.0 Rod

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Specs
Sold in Quantity:
Set
Connecting Rod Length:
6.000"
Piston Ring Style:
E
Piston Material:
Forged Aluminum
Piston Style:
Flat Top w/ 2 valve reliefs
Garage Sale:
No
Piston Diameter:
-
Stroke:
3.875
Wrist Pin Diameter:
.927
Piston Weight:
427
Wrist Pin Weight:
102
Icon Chevy 421 Forged Pistons, Flat Top, 6.0 Rod

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Details

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What's in the Box

Formerly KB Forged Pistons. Starting with 2618 alloy heat treated to high strength T-6 specifications, these give you the best value for your money. Exclusive V-rib adds strength without adding weight but allows maximum cooling.

For Chevy 421 c.i. (4.125" bore x 3.875" stroke). Use Style E rings (1.5mm, 1.5mm, 3.0mm).

  • High ductility 2618 alloy
  • 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

Ring Style Chart (GIF)

474-966 Instructions (PDF)

Item Details

Piston Weight: 427 g. Rod Length: 6.0"
Bore & Stroke: 4.125 x 3.875
Ring Style: E

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You may also be interested in:

Icon Chevy 421 Forged Pistons, .218 Dome, 6.0 Rod
(Part #474965)
                        

Formerly KB Forged Pistons. Starting with 2618 alloy heat treated to high strength T-6 specifications, these give you the best value for your money. Exclusive V-rib adds strength without adding weight but allows maximum cooling.

  • High ductility 2618 alloy
  • 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

For Chevy 421 c.i. (4.125" bore x 3.875" stroke). Use Style E rings (1.5mm, 1.5mm, 3.0mm).

Ring Style Chart (GIF)

474-965 Instructions (PDF)

Item Details

Piston Weight: 427 g. Rod Length: 6.0"
Bore & Stroke: 4.125 x 3.875
Ring Style: E
Total Seal MG2012-025 Maxseal Gapless Top Piston Rings, 4.125 Bore, E
(Part #718M2012-025)
                        

For years, Total Seal has led the field in piston ring technology. These file fit Maxseal sets feature ductile iron gapless top rings, conventional 2nd rings, & standard tension oil rings.

Ring Style Chart (GIF)

Item Details

1.5mm x 1.5mm x 3mm bore
4.125 plus .005 for file fitting
Total Seal Style E Conventional Style Piston Rings, .025 OS, 1.5/3mm
(Part #718CR2012-025)
                        

For years Total Seal has been leader in performance ring technology. These conventional style ring sets featuring a plasma moly ductile iron top ring, cast second and a 3-piece oil ring.  They have a 1.5mm top ring 1.5mm second ring and a 3mm oil control ring.  Fit many aftermarket piston including Mahle.

Ring Style Chart (GIF)