ju10 New Member Mar 3, 2013 #1 I'm about to buy a Greddy SP1 muffler. Does anybody know if this is restrictive? -thanks
TheCrimsonStar New Member Mar 3, 2013 #2 Any aftermarket muffler is less restrictive than OEM. Sent from my Galaxy Nexus using Tapatalk 2
ju10 New Member Mar 4, 2013 #4 okay thanks I just wanted to know because I've been told that straight through mufflers are the only kind that don't restrict.
okay thanks I just wanted to know because I've been told that straight through mufflers are the only kind that don't restrict.