Won't work if it is a fan cooled sled. Indy 500 liquid cooled it would turn into a runner. But you'd have to rejet and clutch it to match it. I did this about 16 years ago on my '89 500 Classic I had back then and it gained about 5mph. Was a little louder than stock, but is definitely not as loud as an mbrp can on any of today's sleds.
