My dad bought a 4-5" expandit downpipe and the 7" stack kit below (basically a Grandrock kit). I needed some longer flex and a clamp. Had to weld some hangers but here it is. The pipe is less crooked than in the pictures now. He has about $650 total in it. $140ish for the dp from gautoparts and $450 for the stack and a clamp and some 5" flex.
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