I have the MSA ceramic coated 6-1 header w/o smog fittings and the performance exhaust system. These are really nice products. The header installed with no problems and no clearance issues when the engine was dropped in. The 2.5" exhaust mates up very well with one small problem: a welded-on hanger bracket was not positioned correctly for the hanger on the differential. The supplied muffler is a bit noisy and has a resonance around 3k RPM - don't count on listening to your stereo system too much, it will be overwhelmed by the Symphony in Straight Six. The muffler installs best with center in and offset out; tilt it about 30 degrees outboard at the top for a clean fit up into fender cavity.
Hope this helps.
Jim
Bookmarks