Hammer Performance - for All Your Harley Davidson XL Sportster and Big Twin Performance Needs
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Pictures of Harley Davidson and Buell Performance Cylinder Heads


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HEAD SHOTS ARCHIVE #1: 1H2012

This Gallery is to showcase some of the cylinder heads we've prepared for our kick-ass customers!


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CNC Ported Sportster XL883 Heads


Eric Tam's XL883 Heads

Eric opted for a 15 degree squish cut in his 883 heads to perfectly match the Sledge Hammer Pistons in his HAMMER PERFORMANCE Bolt-On 1250 Kit. HAMMER PERFORMANCE Smash CNC Head Porting with extra large 1.760" intake and 1.530" Striker High Flow Stainless Valves and PAC Alloy beehive endurance springs with Titanium Retainers keep the cylinder filled and the valvetrain under control with Erics''s SE 575 cams. It all adds up to a hard-hitting combination, Congrats Eric!



CNC Ported Harley Twin Cam Heads


Mike Friberg's Twin Cam Heads

Mike's Twin Cam heads were treated to the HAMMER PERFORMANCE Smash CNC Head Porting process with extra large 1.900" intake and 1.615" Striker High Flow Stainless Valves and PAC Alloy beehive endurance springs with Titanium Retainers. This is a terrific set of heads and should make Mike's bike into a real arm stretcher, congrats Mike!



CNC Ported Sportster XL1200 Heads


Dan Tayler's XL1200 Heads

How do you get a great set of heads without spending breaking the bank? Do what Dan did and send them to us for the HAMMER PERFORMANCE Impact CNC Head Porting service! This service reuses your stock hardware, holding costs down, but makes a dramatic improvement in the flow of the ports and thus the horsepower potential of the heads. It's a great match for bolt-in style cams made to work with the stock hardware, too. Congrats Dan!



CNC Ported Buell Sportster XL1200 Heads


Dan Dauer's XL1200 Heads

HAMMER PERFORMANCE Crush CNC Head Porting has transformed Dan's heads to the works of art you see here. Large 1.900" intake and 1.615" exhaust Striker High Flow Stainless Valves and PAC Alloy beehive endurance springs with Titanium Retainers keep the cylinder filled and the valvetrain under control with Dan's SE 575 cams. His squish bands have also been machined to perfectly match the 15 degree Thunderstorm style Sledge Hammer Pistons in his HAMMER/Axtell 90ci kit. Topped off with a Mikuni HSR45 carb and a Air Hammer air cleaner, Dan's build is the perfect recipe for gobs of streetable torque and power. Congrats Dan!



CNC Ported Sportster XL1200 Heads


Ian Hunter's XL1200 Heads

Ian's late model XL1200 heads are nice heads right out of the box, but after being treated to the HAMMER PERFORMANCE Sledge CNC Head Porting Process they become great heads! Ian went fot the extra-large 1.940" intake and 1.615" exhaust Sledge High Flow Stainless Valves and Sledge Hammer Competition Springs with Titanium Retainers to control the valvetrain with his Wood W9BS cams. He also had us machine the squish band to perfectly match the 15 degree Thunderstorm style Sledge Hammer Pistons in his HAMMER/Axtell 90ci kit. The whole package is rounded out with a set of Carrillo rods, S&S roller rocker arms, JIMS Hydrosolid lifters, and Air Hammer air cleaner. Nothing but the best in Ian's build, hang on tight!



CNC Ported Buell XB Heads


Joe Rogers' XB Heads

Joe chose our exclusive Crush CNC Head Porting for his XB heads, which feature extra-large 1.900" intake and 1.615" exhaust Striker High Flow Stainless Valves with 7mm Stems and PAC Alloy Beehive Endurance Springs with Titanium Retainers. A 15 degree squish band cut makes for a perfect fit with the 15 degree Thunderstorm style Sledge Hammer Pistons in his HAMMER Performance Bolt-on 1250 kit. This is a terrific and proven horsepower producing combination, congrats Joe!



CNC Ported Buell Thunderstorm Heads


Daryl Hampton's Thunderstorm Heads

When you're serious about making your Sportster perform, you do what Daryl did: score a set of Thunderstorm heads and send them to HAMMER PERFORMANCE for our exclusive SMASH CNC Head Porting preparation! They'll look like these: Big 1.850" intake and 1.615" exhaust Striker High Flow Stainless Valves with 7mm Stems and PAC Alloy Beehive Endurance Springs with Titanium Retainers and beautifully finished CNC sculpted high flow ports. Daryl also opted to have the squish band machined to improve power and reduce detonation. These heads will work super with Daryl's SE 575 Cams and HAMMER Performance Bolt-on 1250 kit. Keep the front wheel down if you can, Daryl!



CNC Ported Buell XB Heads


Brandon Franz's XB Heads

Buell XB heads are good heads even right out of the box. But the CRUSH CNC Head Porting Service from HAMMER PERFORMANCE that Brandon chose turns them from good heads to GREAT heads! Our exclusive CNC port work coupled with the finest 1.900" intake and 1.615" exhaust Striker High Flow Stainless Valves with 7mm Stems take these fine heads to a whole new level. Machining the squish band and matching it to premium ultra lightweight forged Sledge Hammer Pistons in his HAMMER Performance Bolt-on 1250 kit makes the chamber the best it can be. Brandon also opted for our supreme quality PAC Alloy Beehive Endurance Springs with Titanium Retainers to make sure his valvetrain is always in control as his SE 575 Cams make the motor scream. Congratulations Brandon!



CNC Ported Buell Thunderstorm Heads


Wes Pock's Thunderstorm Heads

How do you make your factory high flow performance heads even better? Do what Wes did and end them to HAMMER PERFORMANCE for our CRUSH CNC Head Porting Service! Big 1.900" intake and 1.615" exhaust Striker High Flow Stainless Valves with 7mm Stems were fitted to Wes's heads, and the factory squish band was machined for a precise fit to the Sledge Hammer Pistons in his HAMMER 1250 kit for maximum chamber efficiency. Our supreme quality PAC Alloy Beehive Endurance Springs with Titanium Retainers are a perfect match for the SE 575 Cams in Wes's build, too. Hang on tight Wes!



CNC Ported Buell XB Heads


Grind's XB Heads (Scott Evans)

How do you CRUSH your competition with Buell XB heads? Do what Scott did and send them to HAMMER PERFORMANCE! Huge 1.900" intake and 1.615" Sledge Hammer High Flow Stainless Steel Valves and a ported intake manifold make sure the reworked ports flow all the air Scott's motor will ever need. A 15 degree squish cut makes the chamber as efficient as possible when used with the Sledge Hammer Pistons in his HAMMER 1250 Kit. The Sledge Hammer Competition Valve Springs with Titanium retainers, S&S roller rockers, JIMS Powerglide lifters, and Red Shift 585 Cams in Scott's motor are the best valvetrain components money can buy. This is a great combination that should make Scott's bike absolutely rip!. Congratulations Scott!
Update 9/22/12: Check out Scott's 111hp dyno result here!



CNC Ported Harley Davidson XL1200 Sportster Cylinder Heads


Chris Mozzetti's XL1200 Heads

Crush CNC head porting has transformed Chris's heads into the works of art you see here. Extra large Striker 7mm stem high flow stainless steel 1.900" intake and 1.615" exhaust valves were fitted to make sure his engine gets all the air it needs, and PAC Alloy beehive endurance springs with Titanium retainers keeps it all under control with his SE 575 cams. A 15 degree squish band was also cut into the heads to match the Sledge Hammer domed pistons in his HAMMER 1250 kit. These heads are sure to make Chris's bike a screamer, congratulations Chris!



CNC Ported Harley Davidson Twin Cam Cylinder Heads


Sylvain Fleurent's Twin Cam Heads

Sylvain Fleurent is the lucky owner of this Sledge Hammer prepared set of Twin Cam heads! What makes these heads special? In this case, to get the flow Sylvain needs to reach his goals, we fitted his heads with 2.100" intake and 1.615" Sledge Hammer stainless steel high flow valves. Top of the line Sledge Hammer .700 lift springs with Titanium retainers keeps things under control with his big .640 lift cams, and the heads have been machined for compression releases as well to make sure his monster starts easily. What a great set of heads, congrats Sylvain!



CNC Ported Buell XB Cylinder Heads


John Maley's XB Heads

How do you make big power with an 88ci motor? You get a set of heads like John's! These XB heads went through our top-of-the-line SLEDGE HAMMER CNC Porting process to custom tailor the ports to his engine. Huge Sledge 2.000" intake and 1.615" exhaust valves and .700 lift springs with Ti retainers were matched to this beautiful port work and the package was topped off with dual plugs and a 30 degree squish band cut to make the chamber as efficient as possible. This is a superb set of heads and you can bet John's bike will be one tire shredding monster. Congratulations John!



CNC Ported Harley Davidson Sportster 883 Cylinder Heads


Corey Caddell's XL883 Heads

This beautiful set of 883 heads belongs to HAMMER customer Corey Caddell. They perform as good as they look, too, because they've been run through the HAMMER PERFORMANCE SMASH CNC Porting process, which not only makes the ports work great, but also includes our exclusive 1.760" intake and 1.530" exhaust 7mm stem Striker Valves. These big valves also made it possible to size his chambers for the flat top pistons in his HAMMER PERFORMANCE bolt-on 1250 kit. The tried and true SE .536 cams and Sledge Hammer Pushrods handle the valve opening and closing duties. It all adds up to one screamer of a Sportster, congrats Corey!



CNC Ported Harley Davidson Sportster Cylinder Heads


Kenny Vliem's XL1200 Heads

The HAMMER PERFORMANCE SMASH CNC Porting treatment on Kenny's XL1200 heads takes them to a whole new level! Large 1.760" intake and 1.530" exhaust 7mm stem Striker Valves and PAC Alloy beehive springs with Ti retainers combine with the reshaped and resized ports for maximum torque and horsepower from his bolt-on 1250 kit, SE .575 cams, and Air Hammer air cleaner. Kenny's bike is going to rip!



CNC Ported Harely Davidson Evolution Big Twin Cylinder Heads


Sam Canipe's Evolution Big Twin Heads

Evo Big Twins ROCK, and Sam's is about to kick-ass, too! That's because Sam sent his heads to HAMMER PERFORMANCE where they were treated to our SMASH CNC Porting treatment. Extra large 1.900" intake and 1.615" exhaust Sledge Hammer Valves coupled with the reshaped and sized ports guarantees Sam will have the torque and horsepower he needs to keep his Evo running strong for years to come. Super premium Sledge Hammer valve springs with titanium retainers and 10 degree locks keep things under control for high lift, aggressive cams. Congratulations Sam!



CNC Ported Buell XB12 Cylinder Heads


Alan Jaskowiak's XL1200 Heads

Alan is taking no prisoners! He started with a set of late model XL1200 heads and transformed them into this set of race-ready works of art by opting for the HAMMER PERFORMANCE SLEDGE Porting treatment. This treatment uses our exclusive software to custom tailor the ports to specifically to Alan's goals and then automatically generate the CNC program to make the cuts. These heads also got CNC machined 30 degree squish bands for the ultimate in chamber efficiency, and were CNC machined for compression releases as well. Complementing all the CNC machine work, a set of extreme duty oversized Sledge Hammer valves and springs with titanium retainers were fitted, proven components that maximize power and hold up to the most brutal of racing conditions. You won't find a better set of heads anywhere, congratulations Alan!



CNC Ported Buell XB12 Cylinder Heads


Eric Kuhn's Thunderstorm Heads

Eric is a racer, and he came to HAMMER PERFORMANCE because he wants to Pound his Competition!. For that task, he chose the HAMMER PERFORMANCE SLEDGE treatment for his Thunderstorm heads to go with his 88ci engine kit. These heads are custom CNC ported with the exclusive HAMMER PERFORMANCE porting process and feature a 30 degree squish band cut to match Eric's Sledge Hammer Race Pistons. Extreme duty oversized Sledge Hammer valves and springs with titanium retainers make sure his valvetrain will survive even the harshest punishment while keeping this motor at maximum performance. Watch for Eric at the track, he'll be the one hitting it with a HAMMER!



CNC Ported Buell XB12 Cylinder Heads


Chris Bennett's XB Heads

Chris is hitting it as hard as he can, opting for the top of the line HAMMER PERFORMANCE SLEDGE Porting treatment for his XB heads. The ports on these heads have been custom tailored to the 88" kit going into his Buell XB12 and opened up to match Chris's bored throttle body. They also feature our extreme duty Sledge Hammer valves and springs with titanium retainers. The chambers have been opened up and angle cut for the big bore pistons as well. This is a top shelf set of heads and Chris's Buell is going to fly!



CNC Ported Harley Davidson XL1200 Sportster Cylinder Heads


Kot's XL1200 Heads (Krzystof Was)

Only the best for Krzystof's bike, and that means HAMMER PERFORMANCE CRUSH Head Porting on his XL1200 heads. Huge premium quality 1.900" intake and 1.615" exhaust valves complement the port work to make sure his engine never runs out of breath, and the PAC Alloy beehive endurance springs with Titanium retainers makes sure his valvetrain stays under control even when bouncing off the rev limiter. With heads like these, Kot better hang on tight!



CNC Ported Harley Davidson XL1200 Sportster Cylinder Heads


Mike Gill's XL1200 Heads

Mike is unleashing his Sportster's hidden power with the SMASH CNC porting service from HAMMER PERFORMANCE. This service features the reshaping and resizing of the stock ports and fitting oversized 1.760" intake and 1.530" stainless high-flow Striker valves for maximum torque and power. To control the valvetrain with his healthy .575" lift cams, Mike opted for our premium quality PAC Alloy beehive endurance springs with Titanium retainers. And of course our bronze manganese valve guides with viton valve stem seals are standard at all levels of head prep. Paired with the HAMMER PERFORMANCE bolt-on 1250 Kit he's also fitting, you can bet Mike's Sportster will Pound the Competition! Congratulations Mike!



CNC Ported Harley Davidson XL1200 Sportster Cylinder Heads


Aleksey Rozentuler's XL1200 Heads

Prepare for some arm-stretching power Aleksey, because you've got a set of our famous CRUSH CNC ported XL1200 heads for your Sportster! These heads feature huge 1.900" intake and 1.615" stainless high-flow Striker valves, controlled by our premium quality PAC Alloy beehive endurance springs with Titanium retainers, riding in our bronze manganese valve guides with viton valve stem seals. A 15 degree squish band has been carved into the chambers for improved efficiency and breathing, the perfect match for a set of Sledge Hammer 1250 pistons. These are the best components money can buy for your Sportster, congrats Aleksey!



CNC Ported Harley Davidson XL1200 Sportster Cylinder Heads


Jerod McCarter's XL1200 Heads

Jerod's late model XL heads were treated to the SMASH CNC porting treatment, featuring Striker high flow 7mm stem stainless valves in 1.850" intake and 1.615" exhaust sizes, beehive springs, and our top quality bronze manganese valve guides with viton valve stem seals. Jerod's heads also got the 15 degree squish band treatment for optimum chamber efficiency with his 1250 kit. You can bet his bike is going to run GREAT! Congratulations Jerod!



CNC Ported Harley Davidson XL1200 Sportster Cylinder Heads


Lenster's Famous 1250 Heads (Len Majocha)

CRUSH CNC porting transformed Len's late model XL1200 heads into these power-producing works of art!. Len also went for the 15 degree squish band to make these great heads even better. Striker high flow 7mm stem stainless valves in 1.900" intake and 1.615" exhaust sizes, Striker PAC Alloy endurance valve springs and titanium retainers, and our top quality bronze manganese valve guides with viton valve stem seals complement the great port and chamber work with the best hardware made. Len also had HAMMER PERFORMANCE port his S&S intake manifold. The combination adds up to a superb set of heads that will make his Sportster fly. Hang on Lenster!



CNC Ported Harley Davidson Twin Cam Cylinder Heads


Larry Gross's Twin Cam Heads

Larry chose our SMASH CNC porting treatment to power-up his Twin Cam. He opted for the 7mm option for the ultimate in light weight, featuring our Striker high flow 7mm stem stainless valves in 1.900" intake and 1.615" exhaust, paired with our Striker PACalloy endurance valve springs and titanium retainers. The heads of course use our top quality bronze manganese valve guides and viton valve stem seals as well. Larry obviously wants nothing but the best for his Twin Cam, and he got exactly that with this superb set of heads. Congrats Larry!



CNC Ported Harley Davidson XR1200X Cylinder Heads


SimonDyna's XR1200X Heads (Simon Horne)

Simon's heads got the CRUSH CNC porting treatment with the big 1.900" intake and 1.615" exhaust valves for maximum flow. Striker 7mm stem valves with our Striker PACalloy endurance springs and titanium retainers make for an ultra-light, strong, hi flowing and long lasting valvetrain. Bronze manganese valve guides and viton valve stem seals complete the package. The CRUSH head service is a great value as it provides tremendous performance and the highest quality components while keeping the costs under control. Hang on tight Simon!



CNC Ported Harley Davidson XL883 Heads


Keith Goforth's XL883 Heads

Keith's heads got the SMASH CNC porting treatment with the big 1.760" intake and 1.530" exhaust valves, the largest valves you can put in 883 seats. He chose the Striker 7mm stem valves with beehive springs gliding through our bronze manganese valve guides and viton valve stem seals. Note the heavy unshrouding of the big valves. One of the advantages to these extra large valve sizes in 883 heads is they enlarge the chamber enough to use flat top pistons instead of the usual reverse dome, which keeps the options open for future head upgrades. Congrats, Keith, on the great set of heads!

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