Product Details

The first aftermarket billit head availible for the Skidoo Etec 800r. Terra Alps Racing is always pushing to be the best and building the best components for performance minded riders.  

Call or email to order your Etec head and order a color for anodizing your head. (black, blue or orange) 

ETEC Billit heads with higher compression ratios for high elevation riding. Wicked throttle response and acceleration.

Gain up to 10 hp from the bottom to top 8000 rpm.

Stock heads are low compression, gain arm pulling hp and torque by bolting on a Terra Alps Racing billit head. No fuel adders needed! $549.95

Video -


ETEC Turbos! The feed back from our turbo consumers is still having to run too much race fuel to keep off the detonation, the stock head is NOT designed for turbo applications. So we have turbo heads availible for 0-5000' and 5000'-10,000 elevation riders.


Ultimate Turbo set up- Terra Alps Top End kit for etec turbo. $569.95 gain more bottom and mid range punch and acceleration with less turbo lag for your turbo etec. Want even more power add our 860 Big bore built for turbo applications!


The Top 860cc Big bore kit just got better! availible for the 800r ETEC.

Stock cast pistons, reliable!  Fully ported  with our new billit head. The best exhaust Valve modification, proper clearances and nikasil.

$2695 cdn. Big bore kit

$549  PCV fuel controller


PISTONS- Dont let anyone tell you the 85mm 860 piston is not reliable and cracks or breaks off the skirts. Thats a lie. We use the best Japanese pistons availible in the world. With proper silicone content and proper piston clearance it will last 5000 miles no problem. We had some put on 3300 miles in one season. Some shops are using a different 85mm piston or a off shore made piston with improper silicone ratings and have the piston clearance set up wrong. So then any piston would crack. Just a gimmick to make you buy there kits. Would you rather have a 872 kit with an off shore piston? not me.

No hp gain with .5mm bigger piston, weaker cylinder skirts, an offshore piston and little porting.


600 Stock Etec head machining modification.

Gain HP all thru the RPM range for high elevation riding.

$349 cdn.


High flow y pipes, for 800cc and 860cc fully ported engines.

$284.95 cdn.


Clutch Kits! Add a Terra Alps designed helix to your Etec. Help increase acclereation and backshifting. $184.95


Lightweight Etec Exhaust Mufflers!  $334.95


Thermostat kits for Skidoo XP and Polaris. These are the real deal. Thermostat starts to open at 90'f(not 115'f) and closes off the bypass at 120'f(not150'f) so your engine will make max hp. If its running over 140'f its starting to loose hp. $159.95 for billit housing #TAR155 and $69.95 for thermostat #3007-041.


We have complete performance packages for your Skidoo! Don't sacrifice buying something thats not tested from someone hiding behind a keyboard.