[mookarma]

i bought an airaid spacer . . yes, i know it is a 'waste' of money, but for $25, it wasn't a bad deal. . . the only problem is, after i sent out the money, i realized that it is for a 2.5L engine and not a 4.0L engine. i have the latter in a 2001 TJ, and was wondering what would happen if i put it on my Jeep. the 2.5L spacer is bored out to 47mm and the 4.0L to 50mm, so i think it would restrict airflow, but by how much? does anybody know what predicaments i may get myself into by installing this? thankyou!

[Wheelin98TJ]

Sell it on Ebay.

Installing this would be even worse than installing a properly fitted one.

You could bore it out to match your 4.0 TB size, but it would be a waste of time. I had a TB spacer on for about 3 weeks before I took it off and gave it to someone else to try.

[Jerry Bransford]

By the way, throttle body spacers came out since similar risers work so well under carburetors... but they really don't do much, if anything at all, for a fuel inected engine.

[mookarma]

ive just heard other people's engines with them, and i liked the sound. . i figure for $25 ill try it, im not expecting anything but a different sound, but thats kinda what im after. . if it does something horrific, ill take it off. . just wondering if y'all know of anything horrific that will happen when i put it on
thans wheelin and Jerry

[Jerry Bransford]

Nope, nothing horrific will happen.

[Wheelin98TJ]

Nothing good will happen. That's for sure.

You said it yourself first. Using the 2.5 TBS on a 4.0 will create a bottleneck in your intake and will restrict air flow.

[ryanrod]

I also dont think those airaid spacers are going to do anything (except add space).
what about putting a 4.0l throttle body on a 2.5l. I hear that really works good. Do you guys know?