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KB Performance Forged Piston Kit - 4.00 in. Bore - KB661C-STD

  • Part #:
    133394S
  • Manufacturer Part #:
    KB661C-STD

MSRP Price: $289.95

Our Price: $257.88

You Save $32.07 (11%)
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Overview of KB Performance Forged Piston Kit - 4.00 in. Bore - KB661C-STD
  • Pistons forged from 4032 aluminum alloy
  • Forged 4032 alloy is an 1% silicon alloy that is formed in a forging press then fully machined
  • The combination of this alloy and forging process allows the piston to flex under detonation or preignition, giving the best resistance to cracking
  • Since 4032 alloy has a low expansion rate but higher than Hypereutectic, it will require about a .001 in. wider piston to wall clearance
  • Forged pistons are suited for Street or Race with power adders such as NOS or boost
  • Feature an anti-friction skirt coating
  • Offset pin design for quiet operation
  • Each kit contains 2 pistons, pins, spiral-lock pin clips and Hastings moly rings

True 10:1 with Screamin Eagle (MVA) Maximum Velocity Area Heads

For 2007-2015 96 in./103 in. Bored to 110 CU. In. (w/Screamin Eagles 95cc Heads)(Coated Skirts)

Bore: 4.00 in.
Stroke: 4.375 in.
Comp Hgt: 1.076 in.
CC: -4.2
Comp. Ratio: 10:1

Specs for KB Performance Forged Piston Kit - 4.00 in. Bore - KB661C-STD

Bore Size 4.00 in.
Compression Ratio 10:1
Type Piston w/Ring Set
Units Kit
Weight 2.75 lbs

Alternate/OEM Part Number(s):

09103973
Specs for KB Performance Forged Piston Kit - 4.00 in. Bore - KB661C-STD
Bore Size 4.00 in.
Compression Ratio 10:1
Type Piston w/Ring Set
Units Kit
Weight 2.75 lbs
Fitment for KB Performance Forged Piston Kit - 4.00 in. Bore - KB661C-STD

Part 133394S fits the following machines

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Instructions and Manuals for KB Performance Forged Piston Kit - 4.00 in. Bore - KB661C-STD

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