The average STR is already 2.5:1

As far as the stall change, it's 1 time free within the 2 year warranty. Can be confirmed by the number stamped in the front cover of the converter (part that bolts to the flexplate).

The "upgrade" to change it to a multi-disc is based on the condition once it's there. Usually it's $385.00. The stock lining clutch surface is 19 square inches, the surface of the 3 disc setup is over 90 square inches.

What does this stuff mean? Well you can get a used PI converter for $400 (appx), have it restalled from pretty much 2600-4000rpms, AND get it converted to a multiclutch setup meaning it meets and exceeds the stock converter's lockup capacity. So in theory you should be easily able to tow with a multidisc lockup clutch and still lockup AND lock it up in 3rd on the strip for a few more MPH.

Cool eh?

 

Cool, yes. I got a used Vig 3200. But I don't do any towing