com awwwn crash. its good for some gain but not much noticable. back in my toy p-up day i used to do it, its a straight bolt on and you will use the 20R manifolds. yes the 22R valves are bigger, but the 20R has much smoother runners and keeps the air moving better.
the chassis dyno said 10HP at the rear wheels but it didnt come until 2800rpm , like i said, some gain, but how often are you over 2800? only nice on the freeway.
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