: New Exhaust



CateraMV6
04-12-11, 02:33 AM
My Catera came OEM equipped with two mufflers located in front of the rear axle and a Resonator on the driver side behind the rear suspension.
After listening to a few clips where other owners have replaced the OEM Mufflers (under the rear seats) with straight pipes I decided it was too loud for me so the quest began to find a quieter sounding system with a deeper tone but louder then stock.
Thats when I found a few AUDIs running in the area with 3.0L V6 engines, 2 cherry bombs and OEM resonator... the sound was just perfect so I bought two flowtech mufflers off Ebay and paid a shop 100$ to install them. Total cost was around 160$.

Youtube Video.

http://www.youtube.com/watch?v=jxcZ66-Bapc

But that was in 2007 and now its 2011 and finally the left bank broke the welds and as you can image it was time for an upgrade.
I chose to go with a less restrictive glasspack. Turns out Dynomax makes Thrush glass packs with perforated pipes internaly rather then the Louvered look on the Flowtechs. This not only reduces back pressure but it also increases the sound by a few dB.
The project took 2 weeks to research and plan and the result is 2 Dynomax Mufflers (glasspacks) and 1 2" x-pipe.

Here are some pictures.
OLD SYSTEM
http://a2.sphotos.ak.fbcdn.net/hphotos-ak-ash4/189190_532319600629_53800591_31168703_3410693_n.jp g

OLD VS NEW
http://a5.sphotos.ak.fbcdn.net/hphotos-ak-snc6/215090_540385426649_53800591_31196454_2408532_n.jp g

NEW System
X-Pipe after the two pipes come together just after the gearbox.
Those go into twin glass packs (24" long)
Mandrel bent pipes and welds for smooth flow.
Sound is deeper and more balanced, no more rumble.
http://a5.sphotos.ak.fbcdn.net/hphotos-ak-snc6/215812_540383255999_53800591_31196435_5120087_n.jp g

http://a1.sphotos.ak.fbcdn.net/hphotos-ak-snc6/215665_540383295919_53800591_31196437_3236588_n.jp g

CateraMV6
04-12-11, 02:36 AM
I should also note that the total cost of the new system was 80$ and about 8hrs of my time.
All fabrication was done on the floor of my garage with some ramps.
Vice, and a MIG which I borrowed from a neighbor.
I should also say that this was my first encounter with a MIG.

hgqguy
04-12-11, 07:44 AM
We need a new audio to listen to!!!

CateraMV6
04-21-11, 08:36 PM
As promised here is a new shot of it!..> cranck up the base to hear how deep it really sounds..

http://youtu.be/XgtRItShs3w

CateraMV6
04-23-11, 11:05 PM
Here are some new shots now wtih summer trim

http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/224223_540870993569_53800591_31202569_5612508_n.jp g
http://a4.sphotos.ak.fbcdn.net/hphotos-ak-snc6/222229_540870958639_53800591_31202568_625873_n.jpg
http://a3.sphotos.ak.fbcdn.net/hphotos-ak-snc6/223498_540870943669_53800591_31202567_4096957_n.jp g
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/223129_540870868819_53800591_31202562_8010689_n.jp g
http://a4.sphotos.ak.fbcdn.net/hphotos-ak-ash4/216125_540870883789_53800591_31202563_3602516_n.jp g
http://a8.sphotos.ak.fbcdn.net/hphotos-ak-snc6/215861_540870858839_53800591_31202561_7582396_n.jp g