Throttle Body

[91expl-sport]

I want to purchase the 63 mm Throttle Body for a 91 Explorer 4.0 V6 EFI, from Central Coast Mustang known as 4.0 Liter Performance.
I heard that they machine the OEM stock Throttle Body to 63mm.

 

[MyExp]

I just bought the K&N conical filter with the 73mm air flow sensor. So far it has given its worth, I notice a lot more power on the freeway and just general driving around. I drove to their shop and they were very helpful and very nice. They told me the new sensor and filter would add 10-15 hp and would have to agree. Let me know if you purchase the throttle body from them and any performance increase cuz I was thinking about doing the same.

 

[91expl-sport]

I just received my BBK 66mm ThrottleBody installed it in 15 min, reset computer. well
there is a big difference, in the idle and in throttle responce. Truck idle at about 500 or 600 rpm. Next mod will be the borla headers I ordered a mounth ago and a chip and after that a 70 mm MAF...