“Towing mods” on a 6.0L Powerstroke aren’t just about making more power. Under load, the usual villains show up: boost leaks, fuel pressure drop, and heat (oil temp, coolant temp, trans temp… pick your poison). So here are the top ten towing-support parts on RiffraffDiesel.com, ranked by customer review count—no bias, just what people are actually buying and reviewing.

  

1. CAC Intercooler “Hot Side” Boot Kit (03–07) 

The problem: the hot-side boot gets oil-soaked and tired, then starts leaking or blowing off right when you’re asking the truck to pull a house. Fresh 4-ply aramid-reinforced boots rated for high temp/pressure keep the charge-air system sealed so your boost doesn’t turn into “good intentions.”

Check Them Out Here: https://www.riffraffdiesel.com/cac-intercooler-hot-side-boot-kit-03-07/

 

2. Complete CAC Intercooler Boot Kit (03–07) 

The problem: fixing one boot leak is like replacing one bald tire—technically progress, but you’re still gonna have a bad time. The full set tightens up the whole CAC system so towing power is consistent and EGTs don’t climb because boost is escaping.

Check Them Out Here: https://www.riffraffdiesel.com/complete-cac-intercooler-boot-kit-03-07/

 

3. Driver Side Metal Intercooler CAC Tube Kit (03–07)

The problem: the factory plastic driver-side CAC tube (on certain ’04.5–’06 trucks) is not the confidence you want when you’re loaded and climbing grades. Swapping to the metal tube is a solid durability move—and it pairs well with upgraded boots/clamps so the system stays put.

Check Them Out Here: https://www.riffraffdiesel.com/driver-side-metal-intercooler-cac-tube-kit-03-07/

 

4. Alliant Fuel Pressure Regulator “Blue Spring” Kit (AP0086) 

The problem: low fuel pressure under load can shorten injector life and make the truck feel soggy. The blue spring update is a quick win—Riffraff notes many trucks see ~8–10 psi gain—which helps keep fuel pressure where it should be when you’re towing.

Check Them Out Here: https://www.riffraffdiesel.com/fuel-pressure-regulator-blue-spring-kit/

 

5. Garrett PowerMax GT3788VA Stage 1 Turbo (04–07) 

The problem: a tired VGT turbo = inconsistent boost, smoke, lag, and EGTs that climb faster than your blood pressure. A fresh (and slightly larger) replacement turbo restores efficiency; Garrett also notes tuning is recommended for best spool with this larger unit.

Check Them Out Here: https://www.riffraffdiesel.com/garrett-powermax-gt3788va-stage-1-turbo-04-07/

 

6. 6.0L Fuel Filter Set

The problem: dirty or restricted fuel filters are one of the easiest ways to make a 6.0L feel lazy, unhappy, and a lot more expensive than it needs to be, especially when towing. This kit includes both the primary and secondary filter elements, so you’re replacing the whole setup in one shot with a quality set.

Check Them Out Here: https://www.riffraffdiesel.com/6-0l-fuel-filter-set/

 

7. Riffraff Diesel Coolant Filtration System / Filter Kit (03–07) 

The problem: junk in the cooling system is a long, slow march toward clogged passages and higher temps—especially brutal on a tow rig. This kit filters a small amount each pass and is designed to remove solid particles with a spin-on filter setup.

Check Them Out Here: https://www.riffraffdiesel.com/riffraff-diesel-coolant-filtration-system-filter-kit-03-07/

 

8. Mishimoto 6.0L 37-Row Transmission Cooler

The problem: hot trans fluid is how transmissions write their resignation letter. Mishimoto claims up to a 10°F drop in trans temp (with no added pressure drop) and a larger stacked-plate cooler core than stock—exactly the kind of thing that matters when you’re towing in heat or hills.

Check Them Out Here: https://www.riffraffdiesel.com/mishimoto-6-0l-37-row-transmission-cooler/

 

9. Ford OEM Oil Cooler Kit (03–07) 

The problem: oil temp control is huge on a 6.0, especially when you’re working it. This is the OEM oil cooler kit (and the listing notes it supersedes an earlier part number), which is the “do it once and stop thinking about it” approach.

Check Them Out Here: https://www.riffraffdiesel.com/oil-cooler-kit-03-07-6-0l/

 

10. Fuel Rail Crossover™ (FRx) (03–07) 

The problem: the 6.0 fuel system “deadheading” discussion exists for a reason—fuel delivery behavior can get less-than-ideal under demand. The FRx is designed as a system upgrade (Riffraff lists pressure ratings and upgraded components), aimed at improving how fuel is fed across the rails.

Check Them Out Here: https://www.riffraffdiesel.com/fuel-rail-crossover-frx-6-0l-03-07/