rkkoeb
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I have a 09 Apex that I am looking to go from a 121" to a 136". I plan on using the Track USA rail extension but looking for what people suggest for the tunnel extension. I know Tack has them but I heard in the past Muffin works and Hartman had really nice ones but looks like they are out of business now.

twyztid
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Contact Spa City Sled Parts or Barn of Parts to get an OEM tunnel extension from an Attak/LTX model that came from the factory with a 136" track.
Last edited:
rkkoeb
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I will give Spa City a try
rkkoeb
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looks very nice. Just found a Muffin one for $50.
Ted Jannetty
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I have a mountain performance tunnel extension kit I bought years ago and never used if you can use it I will give you a great deal on it 203-753-7223 ask for Ted. 8-5 eastern time.I have a 09 Apex that I am looking to go from a 121" to a 136". I plan on using the Track USA rail extension but looking for what people suggest for the tunnel extension. I know Tack has them but I heard in the past Muffin works and Hartman had really nice ones but looks like they are out of business now.
full tilt viper
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Just did a 129-136 and used a complete rear end from a 2012 XTX on salvage . Everything lines up and bolts right on . Looks factory and the 144 gives you a bit more room back at the cooler
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