Size of SS exhaust???
#1
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Size of SS exhaust???
I got a 2005 Cobalt SS/SC and was wondering how big the factory exhaust is 2.25" or 2.5" and does it go into 2.25" at the muffler? I have a magnaflow muffler and was wondering if I would get much power increase changing the factory resonator? I just don't want too spend 500-800 dollars on a cat-back exhaust.....Thanx
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Stock is a 2,5" catback, but the rear section (rear axle to muffler) is 2,25" crushed bend. Replace it to 2,5" along with a straight through Magnaflow. 10 WHP gain.
https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/how-custom-magnaflow-vibrant-2-5-ss-catback-intake-mod-parts-needed-5478/
A catback (or a custom one) is a MUST before making any other mods on the SS.
https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/how-custom-magnaflow-vibrant-2-5-ss-catback-intake-mod-parts-needed-5478/
A catback (or a custom one) is a MUST before making any other mods on the SS.
#3
my personal opinion is you won't see any gains from changing the factory resonator... it doesn't even have inward facing baffles... your biggest choke points are the muffler and the manifold
#4
Originally Posted by Jmc007
Stock is a 2,5" catback, but the rear section (rear axle to muffler) is 2,25" crushed bend. Replace it to 2,5" along with a straight through Magnaflow. 10 WHP gain.
i don't think everyone has crushed bends.. when i cut off my stock setup, it was mandrel
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Thanx alot for you help guys....I already have a Magnaflow Universal muffler on my car with a 2.5" inlet/4" outlet. I was really inpressed with the gains just with changeing my muffler as the stocker is heavy and decreases hp the most. I just wanted too see if it was worth it to change the factory resonator....I just don't see spending 500-800 dollars on a catback the same diameter as the stock system...Its money I can use for the GM Stage 2!
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Its a great mod man...I spent 200CAN on the stainless magnaflow race series muffler and 50bucks too install it! Awesome cheap mod too make good hp gains....
#8
I wonder if you can order replacement parts for any of the cat-back kits yet?
If you can a guy could just order the section of pipe that goes over the axle to the muffler. It would be stainless and have all of the correct bends and hangers.
I know that Dynomax has a part number for each piece.
If you can a guy could just order the section of pipe that goes over the axle to the muffler. It would be stainless and have all of the correct bends and hangers.
I know that Dynomax has a part number for each piece.
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