You'll need to have one custom made. Any competent exhaust shop should be able to make a mandrel bent 2.5" pipe for you.
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1992 XJ 4.6L "Poor Man's" Stroker
202rwhp @ 4700rpm, 258rwtq @ 3400rpm
1/4 mile: 14.63 @ 94.38, 3450lb curb
AX15, NP231, D30/D35...