A few months ago, we hatched a plan to test every intake manifold for the LS3 engine that we could get our hands on. Given the popularity of the rectangular-port LS3 configuration, it was only natural that the aftermarket embraced it with open arms and offers all manner of intake manifolds, both carbureted and fuel injected. In fact, there were so many intakes available for the LS3, we had to break our test into two parts. Part 1 covered the EFI intakes while in this installment, Part 2, we tested a variety of different carbureted intakes. After all, man does not live by EFI alone, and carbs are plenty popular for many performance applications. Thanks to performance products like the MSD ignition controller, adding a carbureted intake to your LS3 has never been easier. The question now is, which one do you choose? Much like our test on the EFI intake shootout, we need to point out a few facts before we get to the results. For this test, we compared all of the intakes to the factory LS3 EFI intake. As we know, the factory LS3 intake was an impressive performer. The combination of average and peak power makes the stock manifold difficult to beat. If you don’t believe us, just chec...