In stock

KB Performance Piston Kit — 3.875" Standard — 10.0:1 CR — 103" Twin Cam | 96" Big Bore to 103" w/SE 95 cc Heads

KB Performance · #0910-3970 · Top End / Engine

Offset pin design for quiet operation
Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
Replacement rings and pin locks are also available separately

$322.95

In stock. Ships in 2–4 business days · free shipping over $150.

Questions? Call the shop: 801-361-3010

Real shop · real humans · 1231 N 1300 W Ste A, Centerville, UT 84014

Shop all KB Performance
Everything we carry from KB Performance →

Description & features3 features

For '12-'17 103" Twin Cam and '07-'13 Twin Cam big bore 103" (with Screamin' Eagle 95 cc heads).

Offset pin design for quiet operation
Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
Replacement rings and pin locks are also available separately

Specifications15 specs

Bore - Oversize: Standard
Bore Size: 3.875"
Stroke Length: 4.375"
Piston Material: 4032 Aluminum Alloy
Style: Big Bore
Piston Head Shape: Domed
Skirt Coating: M42
Units: Kit
Displacement: 103"
Model: Forged Series
Compression Ratio: 10.0:1
Riding Style: Street
Shipping weight: 2.65 lb
Package size: 5.9 × 5.8 × 5.7 in
Country of origin: Mexico

Fitment9 models · Harley-Davidson

Harley-Davidson9 models

FLD Switchback2012–2016
FLHR Road King2007–2016
FLHTKL Ultra Limited Low2015–2016
FLHX Street Glide2007–2016
FLSTN Softail Deluxe2007–2016
FLTRU Road Glide Ultra2011–2013, 2016
FXD Dyna Super Glide2007–2010
FXDC Super Glide Custom2007–2014
FXSTB Night Train2007–2009

Fitment comes from the catalog data for this part. Double-check your year, model and trim before you order — or call the counter at 801-361-3010 and we’ll check it with you.

Part numbers

Salto part #: 0910-3970
KB Performance part #: KB660C.STD
UPC: 800745242716

Shipping

In stock. Ships in 2–4 business days by ground.

Ground shipping is $14.95, free on orders over $150. Stock is checked again before your card is charged.

Questions4 answers

Is it in stock?: Yes — it’s in stock right now. We check again the moment you order, before anything is charged.
How fast will it get to me?: Usually 2–4 business days by ground.
Will it fit my machine?: It’s listed for the models in the Fitment section above. Not sure about your trim or year? Call the counter at 801-361-3010 and we’ll check it with you.
Is this genuine KB Performance?: Yes. It’s new and genuine, straight from Salto — KB Performance part #KB660C.STD.