This Mustang Parts Installation Guide Works For
Installation Time: (approx) a day
Step 1 Make sure engine is cool and disconnect negative battery terminal.
! CAUTION !
Use extreme caution under vehicle
Step 2 Remove the hose clamp at the throttle body, unplug the mass air sensor if so equipped and remove hose assembly for access.
Step 3 Remove air injection tubes from passenger side*(see note).
Step 4 Remove the spark plug wires and the spark plugs.
Step 5 Working from under the vehicle (use caution) remove the nuts connecting the h-pipes to the exhaust manifold and the nuts holding the mufflers to the h-pipe and slide the h-pipe back a few inches for clearance.
Step 6 Remove the stock exhaust manifolds and clean any gasket material from the heads. (Header removal and installation is from the inside of the engine compartment.)
Step 7 Using the gaskets provided start all the new header bolts before tightening the new headers to specs.
Step 8 Reverse previous steps to complete installation.
*On 1994-95 models remove the steel EGR tube mounted on the passenger side header, kit 1525 & 15250 include new EGR tube assembly
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