When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Like Arde said guys, grinding out the stock throttle body increases it to a 50mm bore. No reason to buy an aftermarket piece until you need more than a 50mm bore.
My point was just the fact that it's a good quality piece without having to do anything yourself for those who don't have the ability to do so themselves.