I have a Helix TMIC for sale. It has a few bent fins as you can see but overall its in good shape. I bought it used with 10,xxx miles on it and I put maybe 100 more on it myself. It measures in at 19” x 8” x 4”, which for reference is slightly smaller than the TXS TMIC which is 19 1/8" x 7 3/8" x 4.5".

Now the bad. As you can see, it comes with a y-pipe but not the silicone elbow that connects with the turbo. This can be had for about $20. Also, two of the bolt holes that connect the y-pipe to the endtank had to be enlarged and re-threaded (the endtank is rather soft metal). So two bolts are M10 and two are M12. Everything tightens down just fine though.

I am asking for $175, given that its not in perfect condition.