New to site. Recently bought a hks hi-power back box, hoping it would fit straight on to oem b pipe. As u know, it didn't. So, I was wondering what my options were? Will only the hks b pipe fit the back box or will another type fit it? Struggling to find the b pipe on its own. The person I got the back box from said the b pipe was ****ed so they went for a new system. Any advice would would be much appreciated.