Go will the fullsac cores. I just yesterday installed mine, and with the proper tools, I think it is a job that anyone with any mechanical ability can pull off. Just be careful to not get carried away grinding on the welds where the meet the inner pipe, the metal is very thin there. Be sure and get carbide burrs to grind with. I installed just the 2" fullsacs cores for my SERG and am well pleased with the "rumble". The Fullsac people are great to deal with. Great products, reasonable prices, and quality information. Just follow the instructions on the link above, or the ones that come with the cores.
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