4.2 SISO Exhaust

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10-05-2005 | 06:36 PM

pdseifert

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Joined: Sep 2005

Posts: 26

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From: Virginia

4.2 SISO Exhaust

Hey all,

A quick question for the board... I have a 97 4.2L that needs to have the exhaust replaced from the cat back, and would like to know if there is any advantage to change it into a SIDO?

Thanks

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10-05-2005 | 07:05 PM

a33bigpapa

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Joined: Apr 2004

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It will be louder and it looks better but you will lose some low end torque in the process. So if you do any towing, keep the SISO setup, but if not go with the SIDO.

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10-06-2005 | 01:39 AM

fourpointsix

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Joined: May 2005

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From: Manteca, CA

Go with a SI/SO Magnaflow. I put one on my girlfriend's 2002 F150 4.2L and it helped the low end a noticeable amount. I had a shop bend 3 inch pipe for it.

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