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OK,I give up. I have a 85 305 TPI/700r4 Camaro. I need to replace fuel pressure regulator diaphram and cannot find correct tork or whatever it is style socket to remove the top of the regulator. They look like a small tork with a little stem or nipple in the center. Anyone know what size or what type of tool is needed to remove this regulator cover? I also posted this question on General Engine/Tech

 

its a tamper proof TORX.

 

I drilled a hole in the center of the torx bit

 

geez , you can get a set of security torx bits for around $10 just about anywhere tools are sold . the size it most likely a T10 .

 

I just took a regular size torx socket and drove it down some, breaking the post in the middle, then clean out hole and screw out bolts.
I've done that a couple times okay.

 

Thanks for your replys. Found #10 tamper proof tork bit at Ace.

 

Just fyi, you can put a regular torx in it , itll go in just a hair deep, and tap it with a small hammer till it seats in there about half way or so. Its better to do this with the fpr off the car , on a table or bench.