The best replacement for full exhaust is cat back.

The best alternatives to full exhaust are rated as following:
★★★★★  cat back
★★★★★  slip on
★★★  muffler
★★  open downpipe
★★  slip on harley
★★  slip on r6
★  slip ons
★  slip on exhaust
★  open headers
  slip ons harley
  slip sportbike
  downpipe

Your alternative for full exhaust is not listed? Suggest!
Speaking about full exhaust, one probably shouldn't forget about power commander.

Other search terms related to full exhaust and their ratings are:
★★★★★ power commander
You have in mind a companion for full exhaust and it is not yet here? Propose!



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full exhaust
cat back
slip on