Here are the the exhaust manifods we use on all of our Gen 3 and Gen 4 LS swaps- 4.8, 5.3 6.0 6.2. They fit with pretty much any suspension set up. We have used them on 3 link, 4 link, stock, long arm etc... Plenty of clearance to the firewall and frasme brackets to buuld your system off of. They clear factory LS ac compressor and allow for use of stock style spark plug wires/boots without fear of burning them up like cheap tubular headers are notorious for doing.
They come raw and we recommend cleaning them with degreaser and coating with your choice of exhaust paint or coating.
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