65mm Throttle Body?

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Mar 4, 2015 | 02:32 PM

RedStar

Thread Starter

Seasoned Member

Joined: Sep 2013

Posts: 291

Likes: 1

Model: Cherokee

65mm Throttle Body?

I need a new IAC valve, so that's gonna run me around $70 for the Mopar version anyway. I found a 65mm Throttle Body on craigslist less than an hour away, and all the valves are included for only $75. Since I need a new IAC valve anyway, I may as well risk the $$$ and just get this TB right?

He says it came off his Rubicon, but I can't find evidence of a 65mm 4.0 Throttle Body anywhere online. Is this legit?

Mar 4, 2015 | 02:38 PM

BrawnyDog

Senior Member

Joined: Jan 2015

Posts: 641

Likes: 1

From: Anderson, SC

Year: 1999

Model: Cherokee

Engine: 4.0

I thought 63 was pushing it, plus you'd at least have to bore out your intake manifold too.

Mar 4, 2015 | 04:46 PM

XJlimitedx99

CF Veteran

Joined: Jul 2012

Posts: 3,132

Likes: 355

From: Andover, VT

Year: 1999

Model: Cherokee (XJ)

Engine: 4.0 L

65mm is too much. I don't think the stroker guys even run them that big.

Mar 4, 2015 | 06:17 PM

mschi772

Senior Member

Joined: Mar 2012

Posts: 974

Likes: 14

From: Racine, WI

Year: 1997

Model: Cherokee

Engine: 4.0

I think practicality ends at 63mm and even then you'd better have the intake, exhaust, and intake manifold bore to go with it otherwise its potential is wasted.