I know this is a couple years later, but do you have a part number for this 2nd restrictor valve you installed? I have almost everything onhand to mod my 6.4 intake; Both 1/4-18 NPT to 1/2" barb brass fittings (one straight, one 90 degree from Amazon), a 1/4-18 NPT tap, JB Plastic Weld, and a BT...