Note from Ryan: Use the table below to find the correct Flowmaster Pro Series configuration for your car or truck. Not sure which to choose? Follow links to check vehicle fit on Amazon.
 |  |  |
| Pro Series Standard | Pro Series Shorty | Pro Series Turndown |
| 3.00" IN / 3.00" OUT | 3.00" IN / 3.00" OUT | 3.00" IN / 3.50" OUT |
| 3.50" IN / 3.50" OUT | 3.50" IN / 3.50" OUT | 3.50" IN / 3.50" OUT |
| 4.00" IN / 4.00" OUT | ||
| 5.00" IN / 5.00" OUT |