My new 55 has 2 1/4" pipes. Will this be large enough If I decide to put the LS2 in it? The pipes look to be in great shape. The mufflers are 14" Super Turbos and too loud inside the car and shorty headers. All out the back.. Hope to decide on the LS2 soon. The 350, t400 with 5k miles may have to come out.