Here's the deal: even a 2.5 mandrel bent pipe has to be very carefully custom fit to get over the axle without contacting the car. Most shops have to cut and test fit, don't get it right the first time. Even the SLP pipe had to be crimped at one point over the axle. No big deal, but it is extra work. They would rather do 4 simple jobs than take a day to do one complicated one.
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