Anyone install catless ‘offroad’ downpipes???

[t76turbo]

For off-road purposes only of course…….


Just curious to hear your experiences regarding performance etc.
I know some live in states that do inspections, emissions testing etc. But some don’t.

 

[Combatvet]

That would be loud AF, my catted downpipes are borderline too loud at WOT.

 

[t76turbo]

stock cat back or aftermarket?

 

[2020FordRaptor]

For off-road purposes only of course…….


Just curious to hear your experiences regarding performance etc.
I know some live in states that do inspections, emissions testing etc. But some don’t.

They would smell, any reputable tuners won’t tune for them, they would sound horrible with any aftermarket exhaust, and there’d barely be any gains.

 

[Combatvet]

stock cat back or aftermarket?

Thermal R&D 3"

 

[UNBROKEN]

The stink like shit, sound like shit and nobody worth tuning your car will touch it after you install them. Combine that with the low single digit HP difference over the normal 400 cell high flow cats and there’s literally no reason to run catless.

 

[t76turbo]

I have used catless down pipes on a number of cars in the past. Mostly for aftermarket kits on naturally aspirated cars like a mercury marauder with ford GT supercar head and cam swap, mustangs, etc. So I have some familiarity with catless cars.

I was thinking it might elimnate some of the heat by eliminating back pressure. I am not a fan of going from the fully heat shielded factory pipes to bare. I have been looking at some heat shield wraps and sleeves to alleviate some of the heat if possible.

 

[UNBROKEN]

I have used catless down pipes on a number of cars in the past. Mostly for aftermarket kits on naturally aspirated cars like a mercury marauder with ford GT supercar head and cam swap, mustangs, etc. So I have some familiarity with catless cars.

I was thinking it might elimnate some of the heat by eliminating back pressure. I am not a fan of going from the fully heat shielded factory pipes to bare. I have been looking at some heat shield wraps and sleeves to alleviate some of the heat if possible.

Excess heat is a non-issue….but if you just want shielding Whoosh Motorsports makes some nice catted and heat shielded DP’s.
I’m over 110K miles on SPD’s with no shielding and never a hint of an issue. Same can be said for literally every other ST running aftermarket DP’s.