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Message: <blockquote data-quote="ram360" data-source="post: 1058242" data-attributes="member: 10773">Results based on 5.0 Mustang Magazine December 2002 issue (page 55).  Test car is a ’90 Coupe with 370 HP and 11 second potential. A number of  66 pulls were made to compile this information. Where does your muffler  stack up? The results in HP order: 1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq2.Bassani Real Street 373.7 hp/ 333.8 tq3.Hooker Maxflow 373.5 hp/ 333 tq4.Borla XS 373.3 hp/ 332.6 tq5.Magnaflow 372.8 / 332.5 tq6.MAC 372.3 hp / 331.5 tq7.Flowtech Afterburner 372.3 hp/ 330.1 tq8.Hooker Aerochamber 372.1 hp/ 330.4 tq9.Bassani 372 hp/ 333.5 tq10.Spintech 371.6 hp/ 332.2 tq11.Edelbrock Performer RPM 370.9 hp / 331.3 tq12.Borla XR1 370 hp/ 334 tq13.Flowtech Terminator 369.5 hp / 331.3 tq14.Dynomax Ultra Flo 369.4 / 333.2 tq15.Flowmaster 369.4 hp / 331.8 tq16.Flowtech Warlock 366.3 hp / 325.3 tq17.No muffs 365.2 hp / 330.1 tq Sound Off in Quietest to Loudest (Decibels): 1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+dbAs you guys can see these are good performance mufflers! Can't believe they are still here!!!</blockquote>