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Pi Head Swap

2827 Views 5 Replies 6 Participants Last post by  Jokers97GT
i have a 98 GT with a few minor mods i want to do a pi head swap and maybe a little heftier cam. i just saw this on ebay was wondering if anyone knew anything about it thanks for the info http://cgi.ebay.com/ebaymotors/1996-1998-Mustang-GT-4-6L-PI-Head-Swap-Kit_W0QQcmdZViewItemQQcategoryZ33617QQitemZ8029331098QQrdZ1
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I recently did the PI swap on my 97 GT 5 spd and it was worth the swap. My car started off at 185 rwhp & 255 rwtq with only 69,000 miles. After the swap and a few more bolt on's I ended up with 253 rwhp & 296 rwtq. For anybody willing to do the swap keep this in mind. You will need a newer heater hose (01 & newer), shorter plug in back of block behind water pump, newer upper rad hose, newer thermostat housing ( bolt holes are different than a early intake), 4 upper bolts for the timing chain cover ( bolt holes in heads are larger than early heads & you need 2 per side). If you install a new set of aftermarket cams, do not buy any of the PI Comp Cams. I tried to install the XE262AH cams and didn't have enough valve clearance so I had to use the PI cams that came with the heads. My engine has flattop pistons and not all non-PI Mustangs are the same. Have your checked before you buy the cams or just buy non-PI cams. There is about 3-5 hp difference between the non-PI & PI Comp Cams of the same size.

97 GT 5 spd

03 PI heads-intake-cams, BBK long tube ceramic headers, BBK short x-pipe w/ cats, Magnaflow Magnapacks exhaust, Tremec TKO tranny, Steeda ADJ. clutch cable-quadrant-firewall adjuster, Pro 5.0 shifter, Ram powergrip clutch, Spec SFI aluminum flywheel, FRPP aluminum driveshaft, Accufab 75mm throttlebody & plenum kit, FRPP 13" Cobra brake kit, 03 Cobra 17x9 front & 17x10.5 rims, Nitto NT555 255/40 front & 285/40 rear tires, Speed Index CAI w/ 9" K&N filter, SCT X-cal tuner

9.63 @ 79 mph in 1/8 mile before swap with worn street tires (only had exhaust)
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