plenum need boring when using a 58mm TB
02-19-2008, 10:52 AM
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Car: 2006 Ford Mustang
Engine: 4.0 V-6
Transmission: Automatic
Axle/Gears: not sure
plenum need boring when using a 58mm TB
Just curious if the plenum holes need to be enlarged to bolt a 58mm throttle body in place of a stock unit.
02-19-2008, 11:16 AM
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Car: 2006 Ford Mustang
Engine: 4.0 V-6
Transmission: Automatic
Axle/Gears: not sure
Re: plenum need boring when using a 58mm TB
I'm just asking cause my throttle body bushing are really bad and got a good deal on this 58mm. So wanted to know if it is a direct bolt on.
02-19-2008, 11:18 AM
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Car: '91 Z28 L98 G92
Engine: Modded L98
Transmission: Modded 700R4
Axle/Gears: Modded 10-Bolt
Re: plenum need boring when using a 58mm TB
Yes, the plenum air-inlet holes will need to be enlarged to match the size of the throttle bores in the 58mm t/b, maybe to clear the throttle blades as the lower half of the blade swings through the plenum opening. I had to enlarge them to fit a 52mm t/b. Otherwise, the 58mm would 'bolt-on' to a non-modified plenum.
Bill
Bill
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