Yes, Mark will take trade-ins on used PowerMax boxes. You have to call them and they will tell you how much yours is worth in a trade. It all depends on how old it is and what model it is. But I am not sure if that is only with PowerMax boxes that were purchased directly from TST or not. Can't hurt to call. Extremely helpful people there at TST Products.
www.tstproducts.com
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1999 2500 Reg. Cab, Sport, 4x4, 24-Valve Cummins(Of Course), Auto, 3:54 LSD, Flame Red/Agate, K&N Air Filter, TST PowerMax1(Original),Straight Piped, DD Stage 3's, Bill K's Valve Body (TC Next), Pillar Mount Pyro/Boost, Xenon Fender Flares, M/T 16x8 Classics, 285 BFG's...
1930 Ford Model "A" Coupe, 327 Chevy ,Muncie 4-spd, Ford 9" Rear w/4:11 Posi, Mustang II Front, All Steel...
1969 Camaro 355 w/Nitrous, 350 Turbo, 4:56 Posi, Hugger Orange w/White Houndstooth Int...
1998 Ski-Doo Mach Z, B&B Eliminator Silencer, V-Force Delta Reeds, 192 Top Gun Studs...