(307) 433-0083          

JASPER Performance Engines

If you are looking to improve the performance of your vehicle, look no further.  JASPER  Performance engines are the choice that some of your favorite NASCAR drivers drivers have under the hood.  Our engines will offer you the performance and dependability you are looking for! Engines that are ideal for street-rods, Corvettes, Camaros and other performance vehicles. You'll be amazed at what you can get for your money with a JASPER performance engine installed right here in our shop and backed by a warranty that is nationwide!

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JASPER transmissions,

JASPER remanufactured transmissions? We do those too! Call and ask about your re power options. We can discuss the options and offer a peace of mind decision when deciding between repowering the vehicle or replacing it.  The nationwide warranty coverage is outstanding. 

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JASPER Driveline 2015 Racing

February 17, 2015:  JASPER Driveline Division Prepares for 2015 Racing Season.   A new year of racing is upon us. The Driveline Division of Jasper Engines & Transmissions looks to build upon an impressive 2014 NASCAR Sprint Cup Series season. Five of the top 10 drivers in the 2014 final points standings drove cars equipped with JASPER products: Denny Hamlin finished third, Joey Logano was fourth, Brad Keselowski was fifth, Matt Kenseth was seventh and Kyle Busch was tenth.

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Cummins 6.7L Holset Turbo

March 6, 2015:  JASPER Engines & Transmissions is pleased to offer a remanufactured Holset HE351VE turbocharger to our customers for 2007 and current Cummins 6.7L diesel engine applications.  “Each JASPER remanufactured Cummins 6.7L Holset turbo undergoes a three-step balancing process,” said Ryan Dooley, JASPER Diesel Division Manager. “The turbine shaft/wheel assembly, and the compressor wheel, are individually balanced on a component balancer.” The rotating assembly, or center section, is then balanced on a high speed VSR machine. “The center section is balanced at over 70,000 RPM.” said Dooley. “We verify balance is at .05 grams per square inch or below for best operation and improved turbo life.”

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Rocky Mountain Automotive LLC

1116 Huger Ave
Cheyenne, WY 82001

location small (307) 433-0083
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