|Welcome to Downs Engineering
|We are now in our 35th year as a
California company and 55 years
in the racing industry. We have
expanded our Hayabusa product
line in order to better serve our
customers. We are a full service
shop and are available to do
research and development
projects, from engine and oil
systems to complete car builds.
We have developed race winning
products and systems for the
Hayabusa engine for the past 18
|making you go fast is what we do best!
|Hayabusa Specialty Parts
|Parts and supplies for all types of Motorsports.
Sand Rails, Kit Cars, Race Cars, Motorcycles, Track Cars,
|Having problems with your Busa? Low oil
pressure? Oil starvation in corners?
Connecting rod failures? Click here for
solutions to these and other problems
inherent in the Hayabusa engine.
|HAYABUSA WINTER REBUILD SPECIAL
We will rebuild your Hayabusa engine using new OEM Main and Rod bearings. The
rebuild also includes New Piston Rings, New Oil Pump, and Cam Chain, as well as a
complete competition valve job. We thoroughly inspect the gearbox and shift forks,
along with the condition of the clutch discs and clutch basket. We run-in the completed
engine on our engine dyno. After run-in we make power runs on our in-house
dynamometer to insure proper running.
If you would like to upgrade your pre 2008 engine to current power and torque levels
we can install the 2mm stroked 2008-2011 1340cc crankshaft and replacement
Get ready now for the 2019 season. Racing starts again soon.
|Lotus 35 before and after restoration