CatmanV2
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Is there such a thing as custom back boxes with valves?
Mine has unsilenced x-pipe primary cat delete secondary 100 cell cats and the "squished" section is fully round so it is "loud enough" for the majority of the time but sometimes I want it to be louder hence why I would consider valved...
That said I read on larini's website you cannot go full throttle with the valves closed as it could damage the engine. I think I'm going to leave it as it is for the moment
Well a decent factor could make you some valved boxes, or you can do what others have done which is simply put a by pass valve in before your rear boxes and vent all the exhaust sideways. There's been some discussion as to quite how sensible that solution is, but it seems to work.
I'm calling BS on the can't run full throttle with the valves closed. It'll certainly increase pumping losses and back pressure but what about the cars that come without valves?
C