Getting a h-pipe...is this worth it?

Smeech

Member
Feb 28, 2004
148
1
16
Fremont, Ca
Yet another h-pipe question, I've decided to go with one with two high flow mac cats and the h-pipe...

Link is here

Is this worth it? There are no hangers with it, he said it didn't come with them... I thought they did? Also, stupid question, what's an o2 boss? It's not similiar to a MIL eliminator, is it?

p.s. I know the item is expired, I'm going through the guy directly.
 
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I went the o/r route, but since you live in Cali. you need the emissions. There are no hangers for it. And the O2 boss is where you screw in the O2 sensors. There should be four of them. Enjoy the new sound you will have.
 
Yeah, no hangers on the h-pipe at all, it just bolts right up. And since you are in CA, you can't legally replace the stock h-pipe. Doesn't stop many people, and I'm keeping the stock pipe around for when smog check time comes.
 
My MRT h-pipe has only two cats, no check engine light yet. If the cats on the Mac are good cats, you probably will not need mil eliminators.

There are 4 sensors connected to the mid pipe, two each side. The first set mounts between the headers and cats, the second set mounts after the cats. The first set measures rich/lean, the second set measures cat operation. I think.

Make sure that when you install the sensors on the new mid pipe they are in the same position as before, one pair has different sensors for left/right.
 
It's not the lodest setup out there, definitely louder than stock idling and cruising, but not real loud, nice deep gurgle. Of course, it really wakes up under acceleration, but I've heard much louder on other cars. I love hitting the gas driving through an underpass. No drone at freeway speed either (maybe I just got lucky).
 
cybore said:
It's not the lodest setup out there, definitely louder than stock idling and cruising, but not real loud, nice deep gurgle. Of course, it really wakes up under acceleration, but I've heard much louder on other cars. I love hitting the gas driving through an underpass. No drone at freeway speed either (maybe I just got lucky).

Cool, I'm hoping for more of a "presence" sound.. the mac catback is already pretty good sounding, louder than my friend's 5.0 with flows/dumps and stock h pipe (smog time :D) I'm sure the h pipe will make a difference. Did you do the magnaflow and mrt at the same time (so you heard the difference the two-catted h pipe makes?)? Next, I NEED to get the tri-ax...
 
I did do them at the same time, but then I took off the mrt for a week or two cause I couldn't get it mounted without a leak at the driver side manifold. With the stock h-pipe, the catback sounded just a bit louder than stock. But with the mrt back in (without leaks) there was a huge difference.