We have a set of used Milltek headers. They have high flow cats and about 5000 miles on them in good condition. They fit all 987 Generation 1 Boxster or Cayman.

$1000 takes them.

 

Will these mate up to a stock exhaust?

Thanks!

 

Yes they fit with the factory exhaust or aftermarket.

 

If I was planning on leaving the stock cat back, do you think I'd get more of a gain from catless headers as opposed to these? I know I'll get a CEL, but I can get that flashed out.

Also, are these the 100-cell or 200-cell cats?

Thanks!
Mike

 

You will get more power and better throttle response because you are reducing restriction. Since you have your secondary and these high flow primary cats, you will most likely not have a cel.

 

MA does sniffer reading/tests for vehicle emission... Unless your car is not registered/off-road use, you may want to double check to make the catless won't cause test to fail, even if you run secondary cats.

 

MA doesn't do sniffer tests at all anymore. Up until last year only 94 and earlier (pre-OBD2) cars would have to go on the rollers. As long as you don't have a CEL, you are good to go.

 

You should be fine with not having a cell. If you want them, let me know.

 

Are these generation 1 or generation 2 from Miltek? I know these are for gen 1 987, the question is are these the revised cat or the original?

 

revised... i know for a fact