Can anyone please advise on fitting of a freeflow de-cat downpipe. the car? I beleive that good power gains can be acheived with the usual mods (air filter, backbox etc). Will the car (MY99) pass the MOT emission test with the centre section retained? I have been advised that this could be marginal with such downpipes as HKS or Magnex.

A sportscat freeflow downpipe is available from Graham Goode Racing but is more expensive at £400. Any experiences?

Also, is there problems with fitting the heat sheild back on due to the increased outlet size? Can this simply be cut back as discussed on previous query?