This long secondary air tube kit includes a 25 3/4" front secondary air tube (PL53158), a 25 1/8" front center secondary air tube (PL53159), a 24 1/4" rear center secondary air tube (PL53160), a 23 1/4" rear secondary air tube (PL53161) and four 1/8" x 1 1/2" stainless steel cotter pins (30068).