The best replacement for glasspack is muffler.

The best alternatives to glasspack are rated as following:
★★★★★  muffler
★★★★  flowmaster
★★★★  resonator
★★★  straight pipe
★★  magnaflow
★★  super 10
★★  flowmaster 40
★★  cherry bomb
★  cherry bomb extreme
★  turbo muffler
★  super 44
★  magnapack
★  chambered
★  cherry bombs
★  thrush welded
★  no muffler
  dynomax
  flowmaster 10
  cherry bomb glasspack
  mufflers
  dynomax bullet
  flowmaster muffler

Your alternative for glasspack is not listed? Suggest!
Speaking about glasspack, one probably shouldn't forget about flowmaster.

Other search terms related to glasspack and their ratings are:
★★★★★ flowmaster
★★★ resonator
★★ magnaflow
You have in mind a companion for glasspack and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of glasspack in all years. Click on graph for more.
glasspack
muffler
flowmaster