RAPTOR ACE (Advanced Coilover Engineering) kits availble for the 146, 154, 163 & 165 Skidoo G4 & Summits.
The ACE geometry was designed to replace old school torsion spring technology with unparalleled coilover performance!


Our rear pivot is constructed of billet aluminum, engineered for strength and durability. The pivot is designed for a 3° x 3° range of motion with an optional lock out mode to eliminate movement.


Our coilover shock packages have established a new performance standard in the snowmobile industry. Custom valving and spring combinations make this setup an extremely compliant performer.


Fabricated of lightweight Chromoly 4130 tubing, our rear torque arm is engineered to be lightweight while still having excellent strength characteristics.


Our coilover front track shock is an add-on option for this package. The range of adjustment in our shocks is second to none in the industry.

*Kit includes all necessary install hardware.

Weight 15 lbs
OEM Replacement Part Number





Industry Leading Compression Adjustment
Spring Pre-load

Spring Type


4 reviews for RAPTOR ACE (Fits G4/XM 146, 154, 163 & 165 track length)

  1. Joel Tingey

    I tried my hardest to break this set up and it took it like a champ. You can control your ski lift much better and you never drag those heavy torsion springs when side hilling. This kit is a huge improvement over the stock suspension

  2. Allan

    You get to control/adjust ski lift much more than with stock set up, but whats even better is the t-motion lockout. The sled is much more predictable + it holds a sidehill way better when the snow gets a little harder. Best bang for the buck mod I ever did

  3. kevin

    This is, hands down, the best rear suspension that I have run on a combo boondocking/jumping sled and I have run them all (freeride, assault, Tom’s, Z-broz, Elka, etc). ON top of that, the customer service has been a step above what I have come to expect in the snowmobile industry. A+

  4. Trip Rippie

    They did a “bang” up job on this one. This kit handles all Jumps, drops, and trees with ease. By far one of the best upgrades for your Doo. Raptors service and employees make sure your taken care of, when I was wrenching over summer I miss placed a few crucial parts for the lock out. I called to buy the parts I lost and they sent out what I needed that week and at no charge. Who in the industry does that? RAPTOR! Thanks guys your product and service is above and beyond.

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RAPTOR ACE (Fits G4/XM 146, 15...