Spectrum is OE on this truck.Changed trim valves on it and now it runs like new. Truck has 7800+hrs on it.Not my favorite system but dont think its bad enough to change.Also had 1 customer want to take teir 1 off his truck but cat would not give written permission.Which i not sure is required but
on these new systems we need to figure how to make them right,As most customers in my area wont foot bill for a total retrofit
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