I have a used FRPP 2012-13 Boss Mustang side pipe kit for sale. Had it on my 2014 GT. Bought it in almost new condition here on the board in 2014. I had it on my show car for about one year or 1,000 miles aprox. Took it off because I installed an off road Lethal X pipe. Its been sitting in a box ever since. Stainless pipes are super clean in excellent condition. Includes block off plates and 2 restrictors. Prefer not to ship but will. Price is $500 shipping extra. Paypal buyer pays fee.