Gen 1 cats or muffler delete?

[Phil Lee 94 red RT]

Which would gain the most HP.Which is more restrictive? I read a post the other day about someone removing the muffler. I've only seen the cats removed on GEN 1 vipers and it seem to make a big diference in HP. Has anybody dynoed there gen 1 with and without muffs?

 

[Newport Viper]

Check my sig for mods. Call Sean Roe for cat back.