In warehouse stock
Kb Performance Piston Kit — 3.498" +0.005" — 8.6:1 CR — 80" Evolution Big Twin
- Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
- Allow 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 and pin lock rings available separately
$233.95
In stock. Ships in 2–4 business days · free shipping over $150.
View cart & check out →
Questions? Call the shop: 801-361-3010
Real shop · real humans · 1231 N 1300 W Ste A, Centerville, UT 84014
Description & features7 features
- Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
- Allow 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 and pin lock rings available 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.
Specifications10 specs
- Bore Size
- 3.498"
- Displacement
- 80", 1340 cc
- Bore - Oversize
- +0.005"
- Riding Style
- Street
- Piston Material
- Hypereutectic Alloy
- Compression Ratio
- 8.6:1
- Units
- Kit
- Shipping weight
- 2.75 lb
- Package size
- 9.4 × 4.7 × 4.6 in
- Country of origin
- Mexico
Fitment21 models · Harley-Davidson
Harley-Davidson21 models
- FXDL Dyna Low Rider1993–1998
- FXDWG Dyna Wide Glide1993–1998
- FXR Super Glide II1984–1994
- FXR21999
- FXR31999
- FXRC Low Rider Chrome1985–1987
- FXRD Sport Glide Grand Touring1986
- FXRDG Disc Glide1984
- FXRP1984–1992
- FXRPF Police1985–1995
- FXRS Low Glide1984–1992
- FXRS-Conv Low Rider Sport Convertible1990–1994
- FXRS-SP Low Rider Sport1986–1993
- FXRT Sport Glide1984–1992
- FXST Softail Standard1984–1999
- FXSTB Night Train1999
- FXSTC Softail Custom1986–1999
- FXSTS Springer Softail1988–1999
- FXSTSB Bad Boy1995–1997
- Low Rider FXRS1989–1990, 1993
- Sport Glide FXRT1993
Fitment comes from the distributor’s catalog. 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 #
- DS-751242
- Kb Performance part #
- KB258.005
- UPC
- 800745060341
Shipping
In stock at a distributor warehouse. Ships in 2–4 business days by ground.
Ground shipping is $14.95, free on orders over $150. Stock is re-checked with the warehouse before your card is charged.
Questions4 answers
- Is it in stock?
- Yes — the distributor shows it on a shelf at a regional warehouse 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?
- The distributor lists it 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 ships new from the same distributors the big online stores buy from — Kb Performance part #KB258.005.