930/911 Turbo Headers with Heat Exchangers Heat:With Heat Exchangers They feature the same expansion

They feature the same expansion flaring as the factory parts to interface with the original rocker shafts

321-alloy stainless steel

6x  Header flange gaskets

When the rocker shafts move in the camshaft housing

or where a transmission swap eliminates the throttle linkage bell crank (ex: 964 5-speed or 993 6-speed into earlier chassis)

930/911 Turbo Headers with Heat Exchangers Heat:With Heat Exchangers They feature the same expansion930 911Turbo Headers with Heat Exchangers 321 alloy stainless steel, 304ss heater boxes (available without heat exchangers, $400 less.) These short flow headers deliver more heat energy and exhaust velocity to the turbocharger, resulting in faster boost response, more torque, and more horsepower. Made to spec by Billy Boat Exhaust, they are a tried and true design used for over 25 years. TurboKraft has used these on engines making up to 600hp at the