Mods

I'd start with a good maintenance check, a good low/mid pipe, and then a head mod.. Much more could be done but I would start there.. Like anything else it will depend on the budget but those few things will be the best bang for the buck imo..

Read on how to set your squish clearance, its free and you will gain a few ponies just by getting things set how they should be in the first place..
 
Try ebay for a pipe. You'll be surprised what you can find. I have a FMF Fatty with the flange if your interested. The finish isn't great, but has no dents. High heat paint will make it look sweet.
 
I'd start with a good maintenance check, a good low/mid pipe, and then a head mod.. Much more could be done but I would start there.. Like anything else it will depend on the budget but those few things will be the best bang for the buck imo..

Read on how to set your squish clearance, its free and you will gain a few ponies just by getting things set how they should be in the first place..
"Squish"???
Please explain..