In stock

KB Performance Piston Kit — 3.750" +0.010" — 8.8:1 CR — 88" Twin Cam

KB Performance · #0910-6089 · Top End / Engine

Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
Allows a tighter fit and longer piston and ring life
Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
Replacement piston rings sold separately

$287.95

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

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Description & features7 features

Kit Includes:

• 2x Pistons

• 2x Wrist Pins

• 4x Spiral Lock Pin Clips

• 2x Ring Sets

Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
Allows a tighter fit and longer piston and ring life
Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
Replacement piston rings sold separately
KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.

Specifications13 specs

Units: Kit
Bore Size: 3.750"
Piston Head Shape: Flat Top
Piston Material: Hypereutectic Alloy
Stroke Length: 4.000"
Displacement: 88"
Riding Style: Street
Ring Material: Moly Coated
Compression Ratio: 8.8:1
Bore - Oversize: +0.010"
Shipping weight: 3.01 lb
Package size: 9.5 × 4.5 × 4.5 in
Country of origin: Mexico

Fitment46 models · Harley-Davidson

Harley-Davidson46 models

15th Anniversary Fat Boy FLSTF2005
Electra Glide Police FLHTPI1999–2006
Electra Glide Police FLHTP1999–2006
Electra Glide Standard EFI FLHTI2000, 2002
Electra Glide Ultra Classic FLHTCU1999–2006
FLHR Road King1999–2006
FLHRCI Road King Classic1999–2006
FLHRI Road King2000–2006
FLHRS Road King Custom2004–2006
FLHT Electra Glide Standard1999–2006
FLHTC Electra Glide Classic1999–2006
FLHTCI Electra Glide Classic1999–2006
FLHTCUI Electra Glide Ultra Classic1999–2006
FLHTI Electra Glide Standard2003–2006
FLST Heritage Softail2006
FLSTCI Heritage Softail Classic2001–2006
FLSTFI Fat Boy2001–2006
FLSTI Heritage Softail2006
FLSTN Softail Deluxe2005–2006
FLSTNI Softail Deluxe2005–2006
FLSTSC Softail Springer Classic2005–2006
FLSTSCI Softail Springer Classic2005–2006
FLSTSI Heritage Springer2001–2003
FLTR Road Glide1999–2006
FLTRI Road Glide1999–2006
FXD Dyna Super Glide1999–2006
FXDB Street Bob2006
FXDC Super Glide Custom2005
FXDCI Super Glide Custom2005–2006
FXDI Dyna Super Glide2004–2006
FXDI35 Dyna 35th Anniversary Super Glide2006
FXDL Dyna Low Rider1999–2006
FXDLI Dyna Low Rider2004–2006
FXDS-Conv Dyna Convertible1999–2000
FXDWG Dyna Wide Glide1999–2006
FXDWGI Dyna Wide Glide2004–2006
FXDX Dyna Super Glide Sport1999–2005
FXDXI Dyna Super Glide Sport2004–2005
FXDXT Dyna Super Glide T-Sport2001–2003
FXSTBI Night Train2001–2006
FXSTD Softail Deuce2000–2006
FXSTDI Softail Deuce2001–2006
FXSTI Softail Standard2001–2006
FXSTSI Springer Softail2001–2006
Road King EFI FLHR1999
Wide Glide EFI FXDWGI2000, 2002–2003

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 #: 0910-6089
KB Performance part #: KB425C.010
UPC: 800745265692

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 #KB425C.010.