Hmmm I didn't have to cut my underbody panels on my Dark Horse. It was a little extra irritating to get in place but still fits even with the 4 pt brace.I don’t have long tube headers, but I recently installed Steeda G trac brace. The only issue I have installing was the underbody “fabric” material was in the way as well as the underbody strakes. It’s not a complete bolt on like I suspect the S550 was. I had to cut the undertray to get the bolts in place. Only thing I’m not sure of is how the next oil change will be. I suspect the brace will require additional steps to remove the undertray to access the oil filter.
Hey TJ. Good news. The brace fits a DH with Kooks LT headers!! Looking forward to testing it out on the track.Send me an email with your contact info - let me run this by our lead tech & see if we can find an answer for you - you can email to tim@steeda