Need Assistance?
Legendary Service... Ask Your Friends - Since 1969
800.969.7501
Over 160K Powersport Items - In-Stock and ready to ship today! View tires, apparel, helmets, exhaust and more!

KB Performance Forged Piston Kit - 3.885 in. Bore - KB660C-010

  • Part #:
    1333931
  • Manufacturer Part #:
    KB660C-010

MSRP Price: $289.95

Our Price: $257.88

You Save:
$32.07 (11%)
1 on Hand

Overview of KB Performance Forged Piston Kit - 3.885 in. Bore - KB660C-010

  • 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 2012-2015 103 in. Twin Cam and 2007-2015 96 in. Twin Cam Big Bore 103 in. (w/Screamin Eagles 95cc Heads)

Bore: 3.885 in.
Stroke: 4.375 in.
Comp Hgt: 1.076 in.
CC: -8.8
Comp. Ratio: 10:1

Included Items:

(2) Pistons

(2) Piston pins

(4) Lock rings

(2) Ring sets including (2) top rings, (2) second rings, (2) oil spacers, (4) oil rings

Instructions 

Specs for KB Performance Forged Piston Kit - 3.885 in. Bore - KB660C-010

Bore Size 3.885 in.
Compression Ratio 10:1
Type Piston Kit
Type Piston w/Ring Set
Units Each
Weight 2.65 lbs

Specs for KB Performance Forged Piston Kit - 3.885 in. Bore - KB660C-010

Bore Size 3.885 in.
Compression Ratio 10:1
Type Piston Kit
Type Piston w/Ring Set
Units Each
Weight 2.65 lbs

Fitment for KB Performance Forged Piston Kit - 3.885 in. Bore - KB660C-010

See if this part fits your ride

Part 1333931 fits the following machines

There are no reviews for this item. Write Review
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!

Instructions and Manuals for KB Performance Forged Piston Kit - 3.885 in. Bore - KB660C-010

You May Also Be Interested In