Well i got 4-1 on my GSR rite now and they slightly touch my drive way when i pull in and out....not a good thing when car i am gonna lowrer the car about another 1/2 or more inch in future. So i am looking for 4-2-1 header that will give me better clearence. I'll to trade my DC 4-1 Ceramic coated and thermal wrap wraped for the 4-2-1. Let me know