If i have the ability to bore out a throttle body to 55 mm myself. How much is it for the larger butterfly? and is that all i would need? i am unsure as to what goes into the process once it is sent out for the machine work. is there anyway to just order a larger butterfly? thanks a lot guys

im sure you would have to call howell or whoever else bores them out and just ask them. I did mine too but I had a guy at my work make me one on the lathe

so you had a guy at work make the butterfly?? how did you do that? b/c i could easily do the same and that would save me a lot of time and money...do you have a print you went by? im nto even sure what the butterfly piece looks like...any info you could give me on how to make that piece would be great...cuz i assume boring it out to 55 mm isnt too hard...thanks a lot