what would be a better a tbi plastic injector spacer-or a throttle body spacer(between intake and tb)? the injector spacer on ebay boasts better gas mileage and small hp gain. anyone even ever heard of or used these?

Just bought a throttle body spacer on Ebay, haven't installed it yet. People sometimes have problems with the throttle linkage.


The injector spacer is a good idea. You may have to do some grinding on the throttle body so the fuel line fittings will clear. A lot of people say if you want to go the easy route, just stack two injector housing gaskets on top of each other.


I doubt either of the two mods do as much as claimed though, however if you can find the parts cheap, why not. Combine them with the Ultimate TBI mods.

ultimate tbi? what do you mean by that?

look at the stickies at the top of the page that will answer most of your questions

to the contrary belief.... in my suburban, the tbi spacer made a huge difference, as far as throttle response, this is with the 4l60 in a 95... the injector spacer was done at the same time... so yea, I think its worth it, it will be a seat of the pants difference! dont spend more than 30 on the spacer and 10 on the injector spacer. check ebay.. i would not drive my truck without one again.

ditto, i had put a tb spacer on my lo3 and it really seemed to increase low end torque.