those 13 inch outside diameter tires with five inch rims- as I read the rules - won't be acceptatable on the salt for your class.
They are ok.
This last weekend I got a new air compressor hooked up. I have had the big IR compressor for about 6 months but needed to run a separate breaker and 230 line. I was given about 6 new IR air tools (right angle, die, cut off, impact, ect....) and this was motivation to get the compressor running. Needless to say it was a full day job running a line from the box to the garage, plumbing and regulating the compressor.
I noticed that there is an ugly transition between the busa TBs and head boot.
With a spare set of TBs I decided to do some experimenting and eliminate the transition.
Now that I can use my die grinder I did some port matching.
Here is a pic of what I did today, I still need to smooth out the bumps but here is the basic idea
BTW: If anyone has a dyno and is willing to do a back to back runs with stock and these TBs to show any gain or loss if the TBs make more HP you can keep the port matched TBs and send me a set of good condition stockers.
Stock:
One side
rough port match