Ernie,

Any seperate (not one-piece) .40-.53 tuned pipe, or tuned silencer, is adaptable to an MVVS .40-.49 engine.
All you need is the right header that will fit an MVVS engine.

This header is available from MVVS, with a gasket and bolts, seperately from their proprietary tuned silencer unit.

It uses a standard 5/8" silicone coupler.

Like all such setups, to get maximum performance, this header may need to be cut.