I have one i made myself using a 4age 20v mani and downpipe. worked well! give it a go diy? I paid 20 for the mani and downpipe and cut and welded it to fit a 4e flange, which i cut from a 4e mani. Noticeable power difference but doesnt look pretty lol. If you do want to give it a go drop me a pm i have pics from when i did mine at the start of summer