🔧 Enhance Engine Performance: Trans-Dapt 2566 Swirl Torq.Spacer Gm99-00 Review

We were wondering why one of the screws only turned halfway and we found this piece of molten aluminum in the screw hole and it was painful to knock out. So many thanks to the QA department.

So I put this on my 03 8.1 Chevy and basically the throttle response is a bit better and I've noticed its performance. My shift points have changed and it's noticeably faster and has more torque. Also, my fuel economy increased by about 1mpg, but then again, I wore it everywhere.

came in a nice box. The expander itself is of good quality. The intake port on the spacer is noticeably smaller than the port on my intake manifold. (The big hole my finger is pointing at.) The instructions are confusing. The pictures in the instructions are of such poor quality that they are unreadable. The screws that come with the kit are a bit short, like the factory screws. So I have to drive to the hardware store if I want to install this at all. Comes with everything you see in my…

This is the second Trans-Dapt throttle body gasket I've installed. Both times the spacers have done exactly what Trans-Dapt says they do. I installed this on my 2003 Chevy Silverado 5.3 V8. Before installation, I didn't feel any noticeable jump in torque up to over 4000 rpm. Now the torque shoots up from around 3300 rpm and increases from there. Since installing it, my box hasn't downshifted as often either. Increasing the torque doesn't require a lower gear as much. I haven't dyno tested it…