not a good idea, whats the harshest cycle on the engine? you would think its the power stoke, but its the exhaust when the exhaust hits TDC it gets yanked back down by the cap on the rod and the only 2 bolts holding it on, a little bit of back pressure is good to "bounce back", sometimes its good to remove some pressure but not always all of it, too big of a pipe say 3" on a NA would lack engine exhaust pulse efficiency? and draw the pulses of the exhaust out the back kind of like a chimney when it warms up
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