The spectre 4-3" coupler is 3" long.

 

Everything I ordered for my H3 arrived today.
Magnaflow $445 shipped
Filter $26.07 shipped
3.5" to 3" coupling $17.87 shipped

Here is the one I got http://cgi.ebay.com/ebaymotors/ws/eB...m=120662361644

It is 3.32" long and fits perfect for replacing the snorkel. I guess that .32" makes all the difference.

It however does not fit on the MAF pipe. I probably could have greased it up and made it fit but would have been a lot of work.

If I replace the top section of the intake and remove the factory resonator off the top I will go with 3.5" and not 3".

Hope my find helps someone.

Shane

 

I have a 2006 H3, here are my findings with this kit. some parts are wrong.

These parts are correct

Parts List
$6.95 x1 Spectre 8711 Vacuum/ Sensor adapter Kit
$7.95 x1 Spectre 8771 3” Coupler kit
$32.95 x1 Spectre 8132 Air Filter
$9.95 x1 Spectre 8718 6” Straight Pipe
$11.95 x1 Spectre 8728 22 Degree Elbow
$1.49 x1 8” ½” I.D. Hose
$ .29 x2 Small Self tapping Screws
$ 1.29 x1 3/8” Foam Pipe Insulation

THIS IS NOT RIGHT
$11.95 x1 Spectre 9761 4”-3” Reducer Coupler


It should be a 3.5"-3" Spectre 9541 or home depot in the plumbing section they have black silicone reducers

Also

The 3" coupler is too short, tomorrow i will be picking up a Spectre 8148 Intake Duct Mounting Plate i think that will mount to my fender well and then i can use the coupler from there to the air intake box. if you use just the coupler and you go off-roading you are asking to get an air box full of water and some serious problems. i think with the duct plate i can also remove the ghetto looking pipe insulation or at least use silicone or something automotive behind for a seal.

Maybe i'm just being picky but like stuff to be right. i would also watch the intake tube rubbing your injector, reaplacing 1 injector will cost you the price of an CAI from Doc.

 

which parts did pep boys have? Part numbers? thanks alot

 

I really didin't like the way the pipe insulation looked or fit. I tried to live with it and made it 1 day.




So i took everything back apart and used a flange type mount


I think it fits much better



I still havent gotten my 3.5" to 3" Reducer coupler but i wll be changing that also, the 4" works but its huge, i actually put the 3" side on first, it was pretty snug but it fit, i wish the 3 inch coupler was longer and i would just use that instead of a reducer. I also have to figure out how to get some clearence on the injector, maybe i can get that out of the way this weekend.

I can definately tell a difference in the way the truck drives, not a lot but enough. I think if i could go back and do it again i would only change the filter and add the flange and coupler to the firewall. that seemed to be the biggest restriction.

 

Nice. I may try something similar.

 

Was washing the truck this afternoon and popped the hood to spray the engine off. First thing I noticed was that every clamp on my new intake tube had worked its way off the rubber boots. I guess they worked loose before all the vibration could crack the plastic.

Also today I fueled up with ridicuously expensive gas and when I entered the info into my Droid, it said my mileage for this tank was 13.7. Same driving as always. No other changes to anything other than the intake tube setup. Maybe it is just coincidence but I have never gotten mpgs this bad. Maybe with all the clamps loose I was getting nothing but bad air? I don't know.

So anyway, I modified the setup a little bit. I started to just put the whole stock setup back on but ended up just using the two accordian boots and the 22 degree bend section from Spectre. The straight piece that I had already drilled for the crankcase vent would not work. You need the bend. So basically I just got rid of the air box. I know the accordian boots will mess the air flow up compared to a smooth pipe but I want to see what difference it makes like this. Because of the different boot sizes, I did end up having to cut up some of the Spectre boots to seal up the ends of the pipe. So far, so good. The vibration that I was first concerned about with the air intake pipe is gone. No more worries about getting too close to a coil pack either. Plenty of clearance now.



You can see in this picture that I used one layer of the Spectre boot to make the factory boot fit the pipe on the throttle body end.


On the filter end I had to use two layers of the cut Spectre boot to make it work.

 

You may have taken these before the final tightening but i noticed on the MAF sensor side, the accordian tube is not all the way seated. That little raisede notch should be in the raised recess of the accordian tube. It may not make much difference but could leak some dirty air throught there maybe? Just an extra pair of eyes sees. :cheers

BTW> When I cleaned my TB the other day that staright pipe was rubbing like hell on the corner of the coil pack locking tab. I refitted a bit and hope it corrects the problem. For anyone else reading this that may be considereing this mod, I would really think about it and seriously consider the extra $ for an AirDoc. Not only does the fitment look better but you eliminate a seam where the 2 component pieces join; another potential source for air leaks.

 

I gave it a shot, i wll be removing this plasticky crap today, it is not worth the risk of a clamp popping off and sucking dirt into my motor to save $50. i will leave the pass through to the fender in place since it is before the filter and not much of a risk. even if it fits right now i think that over time the vibration of the I5 motor will cause the plastic pipe to crack and who knows how long it will take to notice or how much damage will be done by then. Now to see if i can get my $50 back from autozone.

just my 2cents, ex miltary hummer mechanic and H8 recovery specialist

 

i was going to do this to mine but the air intakes must be diff on 08s.what year did they change?