They Do. And the kohler do preform to. We beat a brand new 17.5 briggs by a half a lap in my heat.With the governers still in mine! Same pulley sizes. We would have won but we had to start behin him :evil: . The only place we would lose was coming out of the the courners but gained on the straight aways. Just be sure to buy a junk engine because it is hard to find parts
Austin (Young Gun) Carver
Driver of the DSLMRA Marines #16