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Ford Mustang Muffler Comparison Test - American Rumble
| Open Exhaust | Bassani | Bassani Real Street | Borla XS | Borla XR1 | DynoMax Edelbrock Ultra Flo | | RPM | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | | 2,750 | 103 | 196.7 | 87.1 | 182.9 | 89.9 | 188.8 | 111.7 | 213.4 | 102.1 | 195 | 105.1 | 200.7 | | 3,000 | 138.9 | 243.1 | 109.1 | 208.4 | 107.2 | 204.7 | 148.3 | 259.6 | 141.1 | 247 | 140.9 | 246.7 | | 3,250 | 168.6 | 272.4 | 146.2 | 255.9 | 148.6 | 260.2 | 176.6 | 285.4 | 168.9 | 273 | 168.4 | 272.2 | | 3,500 | 189.6 | 284.5 | 173.2 | 279.8 | 177.1 | 286.2 | 195.4 | 293.2 | 189.1 | 283.7 | 189.3 | 284.1 | | 3,750 | 202.3 | 283.3 | 192.3 | 288.5 | 194.8 | 292.3 | 207.9 | 291.1 | 203.7 | 285.3 | 204.5 | 286.4 | | 4,000 | 214.6 | 281.8 | 204.8 | 286.8 | 208.3 | 291.8 | 219.2 | 287.8 | 215.6 | 283.1 | 214.9 | 282.2 | | 4,250 | 239.6 | 296.1 | 216.6 | 284.3 | 220.7 | 289.8 | 244.3 | 301.9 | 243.2 | 300.5 | 243.1 | 300.4 | | 4,500 | 269.5 | 314.5 | 241.3 | 298.2 | 244.7 | 302.4 | 274.1 | 319.9 | 270.9 | 316.2 | 271.9 | 317.3 | | 4,750 | 291.6 | 322.4 | 272.3 | 317.8 | 274.1 | 319.9 | 294.6 | 325.7 | 295 | 326.2 | 295 | 326.1 | | 5,000 | 308.7 | 324.2 | 293.7 | 324.7 | 295.5 | 326.8 | 310.1 | 325.7 | 311.7 | 327.4 | 310.9 | 326.5 | | 5,250 | 326.3 | 326.4 | 308.7 | 324.3 | 310.9 | 326.6 | 329.4 | 329.6 | 330 | 330.2 | 329.2 | 329.3 | | 5,500 | 345.7 | 330.1 | 329 | 329.1 | 330.8 | 330.9 | 348.3 | 332.6 | 349.8 | 334 | 349 | 333.2 | | 5,750 | 359.2 | 328.1 | 349.3 | 333.5 | 349.6 | 333.8 | 363.8 | 332.3 | 362.4 | 331 | 362.8 | 331.4 | | 6,000 | 365 | 319.5 | 361.4 | 330.1 | 364.1 | 332.6 | 370.9 | 324.6 | 370 | 323.9 | 368.7 | 322.8 | | 6,250 | 365.2 | 306.9 | 369.3 | 323.3 | 371.2 | 324.9 | 373.3 | 313.7 | 369.6 | 310.6 | 369.4 | 310.4 | | 6,500 | 358.8 | 289.9 | 372 | 312.6 | 373.7 | 314.1 | 369.2 | 298.4 | 369.8 | 298.8 | 367.4 | 296.9 |
| Performer RPM | Flowmaster | Flowtech Afterburner | Flowtech Terminator | Flowtech Warlock | FlowtechWarlock
(open) | | RPM | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | | 2,750 | 105.3 | 201.2 | 102.8 | 196.3 | 103.9 | 198.4 | 102 | 194.8 | 102.6 | 195.9 | 109.5 | 209.1 | | 3,000 | 143.9 | 251.9 | 140 | 245.1 | 140.9 | 246.7 | 138.9 | 243.2 | 142 | 248.6 | 151.5 | 265.1 | | 3,250 | 170.6 | 275.7 | 168.9 | 273 | 168.4 | 272.2 | 170.3 | 275.1 | 169.4 | 273.7 | 178.9 | 289.1 | | 3,500 | 190.2 | 285.5 | 189.4 | 284.1 | 189.8 | 284.9 | 189.1 | 283.8 | 185.6 | 278.5 | 193.3 | 290.1 | | 3,750 | 203 | 284.4 | 202.8 | 284 | 202.9 | 284.1 | 202.4 | 283.4 | 199.7 | 279.7 | 207.1 | 290 | | 4,000 | 215.1 | 282.4 | 213.2 | 279.9 | 212.9 | 279.5 | 213.2 | 279.9 | 211.6 | 277.8 | 220.8 | 290 | | 4,250 | 242.6 | 299.8 | 242.2 | 299.3 | 240.5 | 297.2 | 241.6 | 298.6 | 237.8 | 293.9 | 248.1 | 306.6 | | 4,500 | 272.2 | 317.7 | 271.7 | 317.1 | 270 | 315.1 | 270.7 | 316 | 264.4 | 308.6 | 276.9 | 323.2 | | 4,750 | 294.6 | 325.7 | 291.2 | 322 | 292.7 | 323.6 | 294.1 | 325.2 | 281.9 | 311.8 | 292.9 | 323.9 | | 5,000 | 310.3 | 326 | 306.6 | 322 | 306.8 | 322.3 | 307.4 | 322.9 | 295.7 | 310.6 | 306.2 | 321.7 | | 5,250 | 328.2 | 328.4 | 327.6 | 327.7 | 325.9 | 326 | 326.8 | 327 | 318.3 | 318.4 | 328.5 | 328.7 | | 5,500 | 347 | 331.3 | 347.4 | 331.8 | 345.7 | 330.1 | 346.9 | 331.3 | 340.7 | 325.3 | 348.8 | 333.1 | | 5,750 | 362.2 | 330.9 | 361 | 329.7 | 359.7 | 328.6 | 361.3 | 330 | 356 | 325.2 | 362.3 | 331 | | 6,000 | 368.7 | 322.7 | 369.4 | 323.3 | 368.4 | 322.5 | 368.4 | 322.5 | 363.1 | 317.8 | 370.7 | 324.5 | | 6,250 | 370.9 | 311.7 | 368.3 | 309.5 | 372.3 | 312.9 | 369.5 | 310.5 | 366.3 | 307.8 | 374.2 | 314.4 | | 6,500 | 366.1 | 295.8 | 363.7 | 293.9 | 366.3 | 296 | 366.2 | 295.9 | 363.7 | 293.9 | 369.7 | 298.8 |
| Hooker Aerochamber | Hooker MAXflow | MAC | MagnaFlow | SpinTech | | RPM | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | PWR | TRQ | | 2,750 | 103.4 | 197.4 | 102.1 | 195 | 104.6 | 199.8 | 105.3 | 201.2 | 105.2 | 201 | | 3,000 | 140.5 | 246 | 142 | 248.6 | 142.3 | 249.1 | 143.8 | 251.8 | 142.2 | 249 | | 3,250 | 168.3 | 272 | 172.5 | 278.8 | 166.3 | 268.7 | 171.3 | 276.8 | 167.3 | 270.3 | | 3,500 | 190.7 | 286.2 | 189 | 283.6 | 188.6 | 283 | 189.4 | 284.3 | 190 | 285.1 | | 3,750 | 203.2 | 284.7 | 204 | 285.7 | 202.9 | 284.2 | 204.3 | 286.1 | 203.6 | 285.1 | | 4,000 | 213.6 | 280.4 | 214.7 | 282 | 213.1 | 279.9 | 215.8 | 283.4 | 213.3 | 280 | | 4,250 | 240.2 | 296.9 | 244.8 | 302.6 | 240.2 | 296.8 | 244.5 | 302.1 | 240.7 | 297.5 | | 4,500 | 270.6 | 315.9 | 274.8 | 320.8 | 268.5 | 313.4 | 274.2 | 320.1 | 269.5 | 314.6 | | 4,750 | 293.5 | 324.5 | 296.1 | 327.4 | 292.7 | 323.6 | 294.1 | 325.2 | 293 | 324 | | 5,000 | 308.3 | 323.9 | 309.9 | 325.5 | 310.3 | 325.9 | 308.8 | 324.4 | 310.8 | 326.5 | | 5,250 | 327.1 | 327.3 | 329 | 329.2 | 328.2 | 328.4 | 328.9 | 329 | 329 | 329.1 | | 5,500 | 346 | 330.4 | 348.7 | 333 | 347.1 | 331.5 | 348.2 | 332.5 | 347.9 | 332.2 | | 5,750 | 360.4 | 329.2 | 362.7 | 331.3 | 362.7 | 331.3 | 363.6 | 332.1 | 362.2 | 330.8 | | 6,000 | 368.8 | 322.9 | 370.3 | 324.2 | 368.7 | 322.7 | 370.6 | 324.4 | 369.6 | 323.5 | | 6,250 | 372.1 | 312.7 | 373.5 | 313.9 | 372.3 | 312.9 | 372.8 | 313.2 | 371.6 | 312.3 | | 6,500 | 368.8 | 298 | 371.8 | 300.4 | 363 | 293.3 | 369.1 | 298.3 | 369.5 | 298.6 |
There's so much data here, we simply don't have room to dissect it all, but you have it now, so you can choose the mufflers you are interested in and run the numbers through Excel if you are really serious about eking out every last horsepower. If so, Rick Anderson says to pay particular attention to the average horsepower between 4,700 and 6,600 rpm. This range is critical for drag racing this combo. Rick says the best muffler in that range is the Bassani Real Street, but it's probably too loud for the street (and that's saying something coming from Rick). The Hooker MAXflow, both Borlas, and the MagnaFlow closely followed the Bassani RS with good average horsepower in that range. In the end, we say find one that sounds good to you and your wallet and go have fun. Sounding Off
| Muffler | Decibels At Idle | Decibels At 2,000 RPM | Decibels At WOT | | No Muffler | 91 | 103 | Max. | | Bassani Street | 83 | 96 | 120 | | Bassani Real Street | 84 | 96 | Max. | | Borla XS | 80 | 90 | 110 | | Borla XR1 | 83 | 96 | 118 | | DynoMax Ultra Flo | 83 | 94 | 113 | | Edelbrock RPM | 84 | 93 | 118 | | Flowmaster | 82 | 93 | 115 | | Flowtech Afterburner | 86 | 94 | 115 | | Flowtech Terminator | 86 | 94 | 119 | | Flowtech Warlock | 83 | 92 | 112 | | Hooker Aerochamber | 87 | 94 | 114 | | Hooker MAXflow | 80 | 90 | 120 | | MAC | 87 | 98 | 119 | | MagnaFlow | 82 | 91 | 114 | | SpinTech | 87 | 97 | 116 |
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