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All you need to know about swapping your 1996-1998 Mustang GT's non performance enhancing ( non PI) heads and intake manifold to the factory upgraded PI heads and intake.
When you replace your highly restrictive, non PI intake manifold with a Ford Racing Performance Improvement Intake or one of our other aftermarket options you'll instantly feel the difference each and every time you step on the gas pedal.
What is it that changes when upgrading from the 1996-1998 NPI heads and intake to the 1999-2004 Mustang GT’s PI heads and PI intake manifold that makes the swap so complicated? The NPI heads that came stock on all 96-98 GT’s use a different internal design therefore creating the need for a new intake manifold. When you are upgrading your intake and your cylinder heads you’ll also need to pick up some additional parts depending on your year.
New Hoses:
The difference in design causes issues with hose and bracket location’s on 1996-2000’s. The new intake manifold has a longer aluminum reinforced runner that extends the hook up to the thermostat housing. This requires the need for a new hose kit like that on the 1999-2004 GT.
New Brackets:
If you own a 1996-2000, you will also need a new alternator bracket from 2001-2004 GT to relocate it. This bracket makes install easy allowing all your hoses to fit properly and relocates the alternator for proper thermostat fitment.
What about PI Heads for my Mustang?
The 1999-2004 GT came stock with this higher compression, cooler running PI head. The 2001-2004 GT also came stock with the aluminum reinforced intake manifold and together they produce nearly 40 more HP compared to NPI set ups.
Avg. 6-8 hour job w/head swap Avg. 1.5-2 hours w/out head swap.
Avg. 6-8 hour job w/head swap Avg. 1.5-2 hours w/out head swap.
