stock FPR diaphragm
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From: Irmo, SC
Car: 1992 Pontiac GTA
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 10-bolt, 2.73
Yes, I believe that it can be replaced. The spring/diaphragm portion of the regulator can be bought at auto parts stores. Look for a GP Sorenson 800122.
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From: Macedonia ,OH
Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
Believe it or not that piece's spring is a hair longer then the stock AC Delco Unit. When I installed the GP one it raised my pressure 4 lbs.
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iTrader: (1)
Joined: Nov 2001
Posts: 689
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From: Irmo, SC
Car: 1992 Pontiac GTA
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 10-bolt, 2.73
I wonder if the Niehoff Ignition 21720 version of the same part is any better at $42 each?
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Junior Member
Joined: Feb 2005
Posts: 49
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Car: GTA 89
Engine: L98
Transmission: TH700
Axle/Gears: BW 9 bolt
uhh ok everything allright 
2 days ago when I assembling a home-made AFPR ;-) I broke that tiny center shaft....horror
I fabricate a new shaft and press into the spring
2 days ago when I assembling a home-made AFPR ;-) I broke that tiny center shaft....horror
I fabricate a new shaft and press into the spring
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