NRHS is based in the beautiful
city of Berthoud, Colorado. If you are ever in the area, come check us
out! We love to talk shop and would be happy to show you around.
Although NRHS is known for our
premier head porting and conversion kits, we do so much more!
We provide a wide range of services from
simple oil changes to "all-out" performance engine builds. Dyno tuning is also
available by appointment.
Got more questions? Call us!
970-532-3344 We would love to hear from you!
ATTENTION: INTERNATIONAL CUSTOMERS!
Please be advised if ordering from our
website, Paypal does not charge international shipping. After receiving
your order we will send you a separate Paypal invoice for shipping
1250cc conversion kits are now available
in iron lined aluminum construction at this low price!
Why settle for 1200cc when you can have 1250? The legendary NRHS
1250cc kits are now available for an unheard of price. Step up to
the power of a 1250 kit today!
Iron lined aluminum 1250cc kits are now
available at this terrific price in either silver, black or black with
highlighted fins painted finish. Kits include brand new bored and honed
cylinders, forged piston kits with rings and Cometic head/base gasket
kits. These kits are ready to bolt on, no case boring required.
We have kits available for all 1986 and up Sportsters and Buells.
Please call 970-532-3344 for further
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Now Available Online:
NRHS catalog (5 MB)
here to request your NRHS catalog by mail*
Install your engine kit right:
NRHS General Instruction Sheet
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Wide Web site ("Web Site"),
unless otherwise noted, are the property of NRHS V-Twin
Performance LLC and/or Nallin Racing Head Service LLC.
All Rights Reserved.
Nallin Racing Head Service
Harley Twin Cam Performance
Harley Evolution Big Twin Performance
Harley Evolution Sportster Performance
Expert head porting, dyno tuning center,
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More torque and horsepower for your
Twin Cam Hop-ups, bolt-on big bore, Buell
force exhaust, force motor products,
mikuni carburetors, performance motor builders,
engine kits, twin cam heads, evo heads,
buell heads, thunderstorm heads,
performance camshafts, performance cams,
intake porting, throttle body boring,
twin cam throttle body boring, power commander,
power commander tuning, EFI performance,
SPFI performance, v-rod performance, revolution heads,
hurricane performance engine components,
hurricane pistons, hurricane valves,
hurricane adjustable pushrods, harley
drag racing, buell drag racing,
buell road racing, dyna performance
ignition systems, horsepower, torque, dyno charts