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H3 ALPHA Performance exhaust

SolidusJ

SolidusJ

Well-Known Member
Messages
2,028
Location
FT. Carson, CO
All this talk about exhaust system I thought I should show what I did on my T. I went to a weld shop and they help me make this setup, it's a flowmaster 40 siers. I like it but I want it louder and the down pipe is as low as the frame.
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Paladine71

Paladine71

ΜΟΛΩΝ ΛΑΒΕ
Messages
1,483
Location
Tallmansville, WV
I have the Magnaflow Dual Catback for my Alpha. Noticable improvement, nice sound, no issues with UCP, tips are welded. I plan on doing a tip removal before doing a Moab trip.

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H3-ING

H3-ING

AdventureTime
Messages
156
Location
Newport Heights
I picked up a GM performance cat back off of eBay and did the install today.
I cut off the tips because they were huge and clearence was reduced. Now it is more like stock again.
Thanks for all the info on this thread. Made the install super easy.
It sounds great, much throatier than stock, no drone, and quiet at highway speeds, which is exactly what I wanted.



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Hans3T

Hans3T

Lif"T"ed
Messages
3,035
Location
NC
Nice set-up, H3-ING! Good call on cutting the tips. :wink:

Still on the fence about a Flowmaster. There are so many darn options I don't know which one I should go with... :hmm:

Basically, I want my V8 to sound like a throaty V8 should...but not like a hot rod. I'm sure there's a middle ground...right?
 
A

AK RAM

Active Member
Messages
43
Location
Camden, SC
H3-ING said:
I picked up a GM performance cat back off of eBay and did the install today.
I cut off the tips because they were huge and clearence was reduced. Now it is more like stock again.
Thanks for all the info on this thread. Made the install super easy.
It sounds great, much throatier than stock, no drone, and quiet at highway speeds, which is exactly what I wanted.
Click to expand...
what is the part number on that system?
 
Ed's06h3

Ed's06h3

Well-Known Member
Messages
680
Location
Haledon, NJ
H3-ING was the installation hard??? I just purchased one and should receive it this week........I want to install it myself instead of going to muffler shop........
 
H3-ING

H3-ING

AdventureTime
Messages
156
Location
Newport Heights
AK RAM said:
what is the part number on that system?
Click to expand...

19165601

Is for the alpha.

http://www.hummer4x4offroad.com/for...EBay-GM-Performance-Catback-Exhaust-for-Alpha


Install took less than an hour.
Tools: reciprocating saw w/metal cutting blade. 9inch works well. WD40 and a 15mm socket and ratchet.

2 cuts with saw to remove old exhaust. WD the rubber hanger isolators and remove exhaust. Rehang new exhaust. Tighten down the clamps. That's it, pretty easy. I did take it to a local shop and had them do a a few 1 1/2 inch welds on the pipes so that if the clamps ever came loose it would not go anywhere.
 
Portager

Portager

■ ☼▐▐▐▐▐▐▐ ☼■
Messages
1,506
Location
Silverado
Anyone know who made the GM Performance exhaust for the H3T alpha? The GM Performance exhaust is $295 on eBay :link: versus the B&B cat-back at ~$800. Could there be that big of a difference in quality or performance?
 
08SolarFlareH3

08SolarFlareH3

Super Swampers
Messages
2,525
Location
Finger Lakes, NY
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08SolarFlareH3

08SolarFlareH3

Super Swampers
Messages
2,525
Location
Finger Lakes, NY
Portager

Portager

■ ☼▐▐▐▐▐▐▐ ☼■
Messages
1,506
Location
Silverado
The eBay seller seams to have reversed the part numbers. He lists the 19159982 as fitting the H3Tand the 19159982 as fitting the H3.

I verified the 19159982 fits the 3.7L and the 19159984 fits the 5.3L, but it appears the same package works on the H3 and the H3T. I'm not clear on how that works. The H3T needs a longer tailpipe and the H3 has dual exhaust?
 
Portager

Portager

■ ☼▐▐▐▐▐▐▐ ☼■
Messages
1,506
Location
Silverado
SWANK3T said:
Nj3t her around town average was 11 I got 17.5 on the 150 mile trip after the install so it's a combo of the mods + freeway vs in town driving I'm in the middle of a move so not sure what my new around town mpg will be. If freeway holds at 17.5 I'll be stoked.
Click to expand...

Any more mileage results to post? How about an around town mileage after for a direct comparison or highway mileage before the change?
 
08SolarFlareH3

08SolarFlareH3

Super Swampers
Messages
2,525
Location
Finger Lakes, NY
Portager said:
The eBay seller seams to have reversed the part numbers. He lists the 19159982 as fitting the H3Tand the 19159982 as fitting the H3.

I verified the 19159982 fits the 3.7L and the 19159984 fits the 5.3L, but it appears the same package works on the H3 and the H3T. I'm not clear on how that works. The H3T needs a longer tailpipe and the H3 has dual exhaust?
Click to expand...
Mike,

The seller has some info mixed up, it should read H3T and not H3. You have and alpha H3T, so you want part number 19159984.

Here is a list of part numbers by application
19154703 (Performance) - 3.5L & 3.7L I5 H3
17802015 (Touring) - 3.5L & 3.7L I5 H3
19165601 - Alpha 5.3L V8 H3
19159982 - 3.7L I5 H3T
19159984 - Alpha 5.3L V8 H3T
 
H

havona888

Probationary Member
Messages
3
Location
New Mexico
I just purchased and installed the Borla dual cat back exhaust and what came is the GM performance exhaust made by Borla specifically for the H3 alpha. Im satisfied although its just a little louder than stock. Has a nice deep rumble when start and getting up to speed. No drone. Louder over 2k rpms. A little early to tell cause i just have been running them for about 300 mi. but gas has improved and performance is better. If yu go directly to the Borla web page you can find the h3 alpha exhust under 'clearance' they are selling for under 500.00 which is less than 1/2 of regular
 
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