4" exhaust Products

This replacement 4" aluminized steel turbo down pipe from Flo~Pro mates 4" exhaust with the OEM-style HX/HY35 Holset turbocharger outlet flange for your 1994 - 2002 Dodge 5.9L Cummins.

This replacement 4" aluminized steel turbo down pipe from Flo~Pro mates their 4" aftermarket exhaust systems with aftermarket turbochargers (such as Holset's HX40) with a 4" turbocharger outlet flange for your 1994 - 2002 Dodge 5.9L Cummins.

This replacement 4" aluminized steel turbo down pipe from Flo~Pro mates 4" exhaust with the OEM-style Holset turbocharger outlet flange for your 2003-2004 Dodge 5.9L Cummins.

This replacement 4" T409 Stainless Steel turbo down pipe from Flo~Pro mates 4" exhaust with the OEM-style Holset turbocharger outlet flange for your 2003-2004 Dodge 5.9L Cummins.

This replacement 4" aluminized steel turbo down pipe from Flo~Pro mates their 4" aftermarket exhaust systems with aftermarket turbochargers (such as Holset's HX40) with a 4" turbocharger outlet flange for your 2003-2007 Dodge 5.9L Cummins.

Replace the OEM exhaust from the rear of the catalytic converter to the tail with this 4" aluminized steel cat-back exhaust kit from Flo~Pro for your 2003-2007 Ford Powerstroke 6.0L diesel truck.

This replacement 4" aluminized steel turbo down pipe from Flo~Pro mates 4" exhaust with the OEM-style Holset turbocharger outlet flange for your 2004.5-2011 Dodge 5.9/6.7L Cummins turbo diesel.

This replacement 4" T409 Stainless Steel turbo down pipe from Flo~Pro mates 4" exhaust with the OEM-style Holset turbocharger outlet flange for your 2004.5-2011 Dodge 5.9/6.7L Cummins turbo diesel.

Flo~Pro 4" T-409 Stainless Steel Cat Delete pipe kit for your 2007.5-2012 Dodge Cummins 6.7L pickup or Cab & Chassis - eliminates the down pipe catalytic convertor.

Flo~Pro 4" Aluminized Steel CAT & DPF Delete Pipe kit for your 2007.5 - 2010 Dodge 6.7L Cummins - No Bungs. Uses OEM/factory style flanges - will not adapt to aftermarket exhaust.

Flo~Pro 4" Aluminized Cat & DPF Delete Pipe kit for 2015.5-2016 GMC/Chevy Duramax 6.6L LML trucks. Will only fit models equipped with OEM-style 3-bolt flange off of the turbo direct pipe!

A replacement muffler delete pipe for FP833, FP838, FP843, FP853, FP819 kits that fit 2008-2010 Ford Powerstrokes and 2004.5-2009 Dodge Cummins. If you have a muffler currently in your truck (with 4" aftermarket Flo~Pro exhaust) and want to delete it, or, just require a replacement, then this is the pipe for you!

A stainless steel replacement muffler delete pipe for FPSS833, FPSS838, FPSS843, FPSS853, FPSS819 kits that fit 2008-2010 Ford Powerstrokes and 2004.5-2009 Dodge Cummins. If you have a muffler currently in your truck (with 4" aftermarket Flo~Pro exhaust) and want to delete it, or, just require a replacement, then this is the pipe for you!

A stainless steel replacement muffler delete pipe for 2003-2004 and 2013-2018 Dodge Cummins trucks. If you have a muffler currently in your truck (with 4" aftermarket Flo~Pro exhaust) and want to delete it, or, just require a replacement, then this is the pipe for you!

2016-2019 Nissan Titan XD Cummins 5.0L - MBRP's AL INSTALLER Series 4" DPF Filter Back Exhaust System is made from heavy gauge aluminized steel and includes a T304 polished stainless MBRP exhaust tip.

2008-2010 Ford 6.4L Powerstroke Cab & Chassis- Flo~Pro 4" Aluminized Steel Down Pipe Back Exhaust System. This kit comes with a stainless steel muffler but does not include a tip.

This aluminized steel 4" Cat & DPF Delete Race Pipe Kit from P1 Race Parts fits your 2011-2015 GMC Chevy Duramax 6.6L 2500/3500 pickup with the LML engine and includes a muffler. Race tuning required.

2017-2023 GMC Chevy 6.6L Duramax L5P - Made from heavy gauge aluminized steel, this race exhaust kit from P1 Race Parts comes with a 304 polished stainless muffler, but no exhaust tip.

This aluminized steel 4" Cat & DPF Delete Race Pipe Kit from P1 Race Parts fits your 2013-2018 Dodge Ram 6.7L Cummins 3500-5500 CAB & CHASSIS. Race tuning is required to install this kit.

Flo~Pro 4" Aluminized Steel CAT & DPF Delete Pipe kit for your 2019 Ford 6.7L Powerstroke F250/F350/F450 - No Bungs. Race Tuning required.

Flo~Pro 4" T409 Stainless Steel CAT & DPF Delete Pipe kit for your 2019 Ford 6.7L Powerstroke F250/F350/F450 - No Bungs. Race Tuning required.