Intake Options (1 Viewer)

[JerG63]

Hello,

I completed my first mods this weekend. I installed GX460 Front Calipers, Brembo Brake Pads and Rotors, and the new Magnaflow Overland Catback. I have URD Y-pipes and DT headers coming in the mail. I am now considering intake modification to complete the engine for at least for 1-2 years until I begin to think about a tune/supercharger.

What are your experiences with these over the stock intake:
1. K&N replacement air filter
2. aFe Intake ProDryS Filter
3. aFe Intake Pro5R Filter

 

[scmcna]

Hello,

I completed my first mods this weekend. I installed GX460 Front Calipers, Brembo Brake Pads and Rotors, and the new Magnaflow Overland Catback. I have URD Y-pipes and DT headers coming in the mail. I am now considering intake modification to complete the engine for at least for 1-2 years until I begin to think about a tune/supercharger.

What are your experiences with these over the stock intake:
1. K&N replacement air filter
2. aFe Intake ProDryS Filter
3. aFe Intake Pro5R Filter

Let me know how DT headers work out (EPA street version) & install costs. Thx

 

[JerG63]

how DT headers work out (EPA street version)

What do you mean by EPA street version?

I have not received the headers yet, but will there be room to attach catalytic converters between the DT long-tube headers and the Y-pipe? I had thought that the headers will connect directly to the URD Y-pipe and thus an illegal "cat delete" I have not ordered cats because of this, but correct me if i'm wrong.

 

[scmcna]

I replied on FB
never considered long tube since not EPA legal-not EPA street legal.

 

[scmcna]

What do you mean by EPA street version?

I have not received the headers yet, but will there be room to attach catalytic converters between the DT long-tube headers and the Y-pipe? I had thought that the headers will connect directly to the URD Y-pipe and thus an illegal "cat delete" I have not ordered cats because of this, but correct me if i'm wrong.

I don’t think so, if you look at where existing cats fit off the shorties pictured below. Expect you’d have to reroute to a dual exhaust and reMove the Y so cats and long tubes have room. Go to DT website that link to install videos. Comments of the installer after the fact are telling and why he charges $1200 labor. Know that DT started in the 60-70s when engine bays were spacious & not cluttered w all the pollution and computer equipment.

 

[ArBrnSnpr]

I just installed the long tube headers and URD Y pipe and the manaflow exhaust. I drove it catless for about 10 miles. I was terrible! I welded a cat into the catback right where the Y pipe and catback merged. It was a bit better but still terrible. I ended up measuring the circumference of the factory Y pipe and saw it was the same as the URD pipe. Wrap a string around the mid pipe even where the collapsed section is and you'll see there's no reduction in pipe diameter, so no decrease in flow/increase in restriction. I ended up putting those cats back in and it was a big performance improvement. I have the URD Y pipe sitting in my garage now.

This truck needs cats or forced induction. Maybe catless with an intake and tuning would run ok, but with a K&N panel filter and stock programming, it was a dog.

 

[JerG63]

Can you explain what was "terrible" about it? Did the performance drop with headers? Or was it too loud?

 

[ArBrnSnpr]

There was a massive loss in performance until roughly 5k RPMs and the sound was beyond obnoxious. Given the purpose of the vehicle, the powerband was in a terrible place.

 

[JerG63]

There was a massive loss in performance until roughly 5k RPMs and the sound was beyond obnoxious. Given the purpose of the vehicle, the powerband was in a terrible place.

Might need to look into a tune for these mods then.
For the catback, you have the Mangaflow Overland Series Exhaust right, #19544?
Did you install the O2 Sim from URD?

 

[ArBrnSnpr]

I did not install the o2 sim. It's a universal and I didn't find it to be compatible with a system with 2 downstream sensors. I installed the pre cat sensors in the headers, then welded o2 bungs into the post cat piping and used an o2 sensor extension to wire the factory post cat sensors. If URD ends up doing a GX specific simulator, I might give it a try to see if it provides any benefits (performance/economy), but running the factory sensors has given me zero issues with the factory cats on the mid pipes.

I'd just return the URD mid pipe and use the OE piece. I was very disappointed and spent a lot of time and money welding and moving stuff around to get the right combo.