/mk a 6''in diam designer of EI K' Mx exhaust systems / /use 2 points of contact for pi bonds - creates the headers sections + rate Eq4 - 2 i.e. 2x2 / /^8' rates Al8 - 16 > 14 - 6 for fused signa bonds - rate Al6 - 8 [C+-B]t = [D+-A] kt in mid grade sizals i.e. temps exhaust qualities // simulate whole intake port exhaust system - ek headers /