Originally Posted by Pb82 Ronin

Go on the website and look at the features man. He's not a vendor here so I can't post a link without violating forum rules.

The spark kill during shifting is adjustable. The 2 step is adjustable. It also has nitrous retard and kill during PSing function. All with the push of a button. You simply can't do the majority of what this box can do with tuning the OEM CPU. The nitrous functions alone make it worth the purchase. FWIW, in my Cobra, I was consistently 3-4 tenths faster at the track. Once you set the 2-step to the track conditions, you can nail your launch every time...then bang the gears on home.

EDIT: And you're right...slicks make ALL the difference. And 315 Hoosiers? The stock tire is a 325. You can get 345's on the stock wheel. Why so small?

Originally Posted by Unreal

Width has very little to do with track. A 275 MT pro will out hook a 345, and run faster. Don't get caught up on width. Narrowest tire that hooks will be fastest.