Hammer Performance - for All Your Harley Davidson XL Sportster and Big Twin Performance Needs
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Dyno Room and Results for Harley Davidson and Buell Performance Products and Services from HAMMER PERFORMANCE

New Harley Davidson and Buell Performance Products from HAMMER PERFORMANCE

Garage Sale Products from HAMMER PERFORMANCE

Harley Davidson and Buell Performance Photo Gallery

Pictures of Harley Davidson and Buell Performance Cylinder Heads

Pictures of Custom Air Hammer Air Cleaners

What's New?

Click Here for an index of recent web site updates

Bolt-On 1250 Kits for Sportsters & Buells

New Low Price on 86-03 Small Fin Kits - Only $599.95!

Hammer Performance 1250 Kit for 2004-Present Sportster Black with Highlighted Fins and 30 Degree Reverse Dome Sledge Hammer Pistons

These kits use special cylinders with an extra-thick iron liner for maximum rigidity and ring seal. The included SLEDGE HAMMER pistons are the lightest and strongest 1250 pistons available.

Click Here for all the details on these amazing kits.
Shipping Now! Order online or call Dan directly at (208) 696-1250


with a Hammer Performance bolt-on 1250cc kit!

Recent Web Site Updates:

4/3/14: Bassani Slip-Ons Tested
3/16/14: Wade Richards Dyno Sheet Posted
3/9/14: Cycle Shack Slash Slip-Ons Tested
3/9/14: Stock 2007 Exhaust Tested
3/6/14: John Plaster Dyno Sheet Posted
3/3/14: The Shop Mule Gets Crushed!
3/3/14: Jay Sutter Dyno Sheet Posted
2/27/14: Additional Information added to the Contact Us page
2/18/14: New Video from RedLine Racing/Madnss
1/19/14: Gaterman Lifters Now Available
12/3/13: RSD Slant 2:1 Exhaust Tested
12/3/13: Art Hernon Dyno Sheet Posted
11/29/13: Seven New Pics Added to the Photo Gallery
11/29/13: New FAQ Section in 883 Conversions Tech Article
11/29/13: John Helfer Dyno Sheet Posted
10/21/13: Terry Flynn Dyno Sheet Posted
10/21/13: Harley Matson Dyno Sheet Posted
9/24/13: Install Instructions for CRUSH & SLEDGE Air Hammers Posted
9/24/13: Install Instructions for IMPACT Air Hammers Posted
9/23/13: New Air Hammer Models Offered
8/20/13: New Tech Article: Dyno Testing XL Exhaust Systems
8/16/13: Fourteen New Head Shots
8/14/13: Dave Cremeans Dyno Sheet Posted
8/5/13: Richard Taylor pic added to the Photo Gallery
8/3/13: Richard Taylor Dyno Sheet Posted
7/27/13: Bob Thompson Dyno Sheet Posted
7/24/13: Aleksey Rozentuler pic added to the Photo Gallery
7/20/13: Seven New Head Shots
7/17/13: Thunderstorm Heads Discontinued
7/12/13: Slapster pic added to the Photo Gallery
7/11/13: Aleksey Rozentuler Dyno Sheet Posted
6/30/13: Six New Head Shots
6/30/13: Dave Wilhdlm pic added to the Photo Gallery
6/25/13: Tyler Woodard Dyno Sheet Posted
6/24/13: HAMMER Customers dominate XLF Shootout
6/24/13: John Helfer pic added to the Photo Gallery
6/22/13: Updated Dyno Sheet for Mort Gelberd
6/1/13: Five New Head Shots
5/26/13: New Air Cleaner Pic in the Get Hammered Gallery
5/23/13: Six New Head Shots
5/4/13: Dave Wilhdlm Dyno Sheet Posted
4/30/13: Two New Head Shots
4/27/13: Tyler Woodard Pic added to the Photo Gallery
4/27/13: Two New Head Shots
4/22/13: Aaron Thomas Pic added to the Photo Gallery
4/21/13: Two New Head Shots
4/15/13: Six New Head Shots
4/7//13: Garage Sale Page Added
4/4//13: Ryan Dhabalt Dyno Sheet Posted
3/29/13: Three New Pics in the Photo Gallery
3/29/13: New Air Cleaner Pic in the Get Hammered Gallery
3/29/13: Three New Head Shots
3/27/13: Five New Head Shots
3/26/13: New XL Pinion Gear Locking Tool Offered
3/8/13: Three New Head Shots
3/3/13: John Plaster Dyno Sheet Posted
3/3/13: Two New Head Shots
2/24/13: Mort Gelberd Dyno Sheet Posted
2/19/13: Four New Head Shots
2/15/13: Small Fin 1250 Kits On Sale!
2/11/13: Two New Head Shots
2/10/13: New Dyno Sheet added to the Dyno Room
2/8/13: New .660 Lift Cam Grind for XL's
2/8/13: Three New Head Shots
1/31/13: Matt Matthews Pic added to the Photo Gallery
1/29/13: New 30 Degree Reverse Dome Conversion Piston Offered
1/29/13: Two New Head Shots
1/23/13: Two New Head Shots
1/19/13: Two New Head Shots
1/15/13: Two New Head Shots
1/6/13: Patriot Defender Exhaust System Now Offered
1/4/13: Three New Head Shots
1/1/13: TTS Mastertune Now Offered
12/30/12: New Naked Buell Air Hammer Introduced
12/29/12: Dynojet Powervision Now Offered
12/27/12: New Tech Tips: Converting an XL883
12/27/12: Leo Lumbreras added to the Photo Gallery
12/26/12: Samson Powerflow III Exhaust System Now Offered
12/25/12: Torque Hammer Exhaust System Now Offered
12/21/12: Two New Dyno Sheets
12/21/12: New Tech Tips Article: CNC Head Porting
12/19/12: Three New Head Shots
12/19/12: History Page Update
12/5/12: Four New Head Shots

(c) Copyright 2010-2013 Hammer Performance LLC
All Rights Reserved
All images and other content on this web site are the property of Hammer Performance and are not to be used without written permission.

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