We have had great results with the 121 and 136 style coolers that we build in house, however when looking at numbers they are just not cost effective for us to continue building. We could up the price, but with the sleds that require them starting to age we feel the demand just won't be there. Still wanting to offer a rear cooler solution we have been working on a new design that utilizes the abundance of running board coolers we have on hand. The new design will also work on both a 121 and 136 sleds. By recycling used heat exchangers and designing one cooler for both models we will be able to offer a very affordable rear heat exchanger. Below is a photo of our prototype fit up on a 136 sled. It fits underneath the stock tunnel protectors, so like our current 136 cooler there will be no need to craft up your own tunnel protectors.
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