Schumacher headers 440 in 71 Duster

ultimatejay said
yeah at low rpm I'm sure they rip, but top end-= negative ghostrider

Tri-y works well and fit better than and full length big tube headers but yeah they're not a high rpm header but most big blocks peak well under 6,000 rpm and unless you take your car to the strip or dyno it it's probably way less than 500hp.