Installed Headers

[iamdub]

They look pretty good. They look exactly like speed engineering.

I had to research this. Unless these are just stock photos, I can see some notable differences:

I'm gonna look for real-world pics of the headers to be sure. They are all advertised as being made of 304 stainless, but I don't know what gauge. Just comparing the two above pics, I like the SE better due to the slightly less abrupt primary-to-collector transition and smoother Y-pipe merge. The primaries also appear to be equal-length or at least closer to it. I'd rather equal length over "whatever fits" length as a second place to tuned length.

It also looks like the DNAs are a bit undersized- not quite 1.75" primaries and I don't know what's up with that 2.36" collector outlet diameter.

This is all just fine for a stock motor, but it's leaving power on the table and not allowing any room for future mods. I'm sure they sacrifice some upper-RPM power to retain a bit more low-end, though.

 

[Tonyrodz]

I had to research this. Unless these are just stock photos, I can see some notable differences:

I'm gonna look for real-world pics of the headers to be sure. They are all advertised as being made of 304 stainless, but I don't know what gauge. Just comparing the two above pics, I like the SE better due to the slightly less abrupt primary-to-collector transition and smoother Y-pipe merge. The primaries also appear to be equal-length or at least closer to it. I'd rather equal length over "whatever fits" length as a second place to tuned length.

It also looks like the DNAs are a bit undersized- not quite 1.75" primaries and I don't know what's up with that 2.36" collector outlet diameter.

This is all just fine for a stock motor, but it's leaving power on the table and not allowing any room for future mods. I'm sure they sacrifice some upper-RPM power to retain a bit more low-end, though.

I shouldn't have said exactly. They do look similar tho.

 

[08HoeCD]

In a daily driven, heavy, full-size SUV, I’ll take low-end torque over high-rpm power all day.

 

[GTNator]

In a daily driven, heavy, full-size SUV, I’ll take low-end torque over high-rpm power all day.

I’ll take both.


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[Big Mama]

Good points thanks

 

[iamdub]

In a daily driven, heavy, full-size SUV, I’ll take low-end torque over high-rpm power all day.

Agreed, which is why I added that last sentence as an attribute. It'd be awesome to see back-to-back engine dyno comparisons between these two brands, Kooks and AR. Maybe check with the Engine Masters guys on that Motor Trend YouTube channel...

 

[iamdub]

Just wanted to throw this in here. I haven't watched it yet, but I'm starting it now.

 

[swathdiver]

I appreciated the video but think it would have been nice to see a stock truck engine, something we drive and see how those headers performed. That motor had a huge cam, certainly not anything we'd run in a street truck. Maybe it's been done already, IDK.

Andy was supposed to get tuned Friday, wonder if he's still driving around enjoying the newfound power? hehehe

 

[badandyturbo]

Ok so I got the truck tuned Friday at Horsepower Sales. I had them remove the DOD and secondary O2 sensor. To sum it up in one word, awesome! I am very happy with the results from my mild modifications. I promise I will get some more pictures of under the truck and a video of it running. It does not drone on the highway and is actually quite tame unless you get on the throttle.

Also to answer a previous question. The mid/y pipe is above the transmission support beam.

 

[swathdiver]

Horsepower Sales is still around? Used to buy parts from the store in Fort Lauderdale back in the 1980s then they closed or moved. Where are they now?

Glad everything is working out. Now its time to head to Moroso, um, Palm Beach International Raceway and see how much rear wheel horsepower it is making. I'd like to run mine too; haven't made a pass down that track since... hmm... can't remember but ************ was in his first term.

 

[badandyturbo]

Horsepower Sales is still around? Used to buy parts from the store in Fort Lauderdale back in the 1980s then they closed or moved. Where are they now?

Glad everything is working out. Now its time to head to Moroso, um, Palm Beach International Raceway and see how much rear wheel horsepower it is making. I'd like to run mine too; haven't made a pass down that track since... hmm... can't remember but ************ was in his first term.

Yes they moved a couple years ago to Riviera Beach. They are over by St. Mary's hospital.

I'm down to run at the track. Just let me know when.

 

[swathdiver]

I'm down to run at the track. Just let me know when.

www.racepbir.com

December 16th, a Saturday, is truck only drag night! Test and Tune are Fridays, the 1st and 8th only for December. I think truck night would be fun and my clan is up for it. Let me know.

 

[Kyle Pezzetti]

Did your truck already have only one down stream o2 or did you have two

 

[swathdiver]

Only one on each side below the cats.

 

[Kyle Pezzetti]

OK wasn't sure how these worked for it since from the pictures it inky has a bung athe the y. Would that matter if the down stream o2 gets turned off with a tune

 

[swathdiver]

The downstream O2 sensors measure the health of the cats so to speak.

 

[badandyturbo]

Correct. Our trucks have one pre and post cat on each side for a total of 4 sensors. There is a bung in the new headers for all 4 to be put back in. I only replaced the pre cat sensors and plugged the other two holes with the supplied plugs.

 

[Kyle Pezzetti]

Correct. Our trucks have one pre and post cat on each side for a total of 4 sensors. There is a bung in the new headers for all 4 to be put back in. I only replaced the pre cat sensors and plugged the other two holes with the supplied plugs.

Perfect thank you

 

[randeez]

glad to hear everything went on smooth!
someone mentioned the flange connections - the 1-7/8 speed engineering long tubes/ypipe i have came with slip connections and clamps that dont work to seal up hardly at all. i tried to get better hardware to really crank down the clamps, it barely helped. Then i swapped them all over for the band style clamps which was better, but still had a few leaks that annoyed me. I just ripped mine back off tonight to have vband connections installed at each header collector and have the ypipe welded up solid back to the cat back. moral of the story... I would have rather of had the 2/3 bolt connections to begin with! a little more bulky but would have sealed up nice.

how's yours for noise? i'm trying to stuff a small resonator back in where the 3rd cat was to take the edge off of mine. mine doesnt drone or anything but it gets pretty loud just running up through the gears normal driving

and I am usually out at pbir for test and tune friday nights, I will usually run my truck if ive made any changes (none lately) sometimes just go to hang out

 

[992dr]

That's the only down side to the speed engineering exhaust. They use really bad clamps.
A little trick you could try is to wrap some foil around the inside of the clamp, like a gasket. Make it a few layers thick.

I've been debating v-bands. I have a few extra sets of the some nice ss 3 bolt flanges from my 2dr build left over. May just use those for the exhaust and use v-bands for the header flange. I already have one v-band welded up on one cat.

Do you have cats?