6.9 exaust ?????????
Mountain Pass
Joined: Sep 2004
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Freshman User
Joined: Dec 2013
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Thinking about doing true duals . Not sure if I need a y pipe or should I just leave it single on each side
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From: Manteca
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Laughing Gas
Joined: Feb 2010
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From: Port Orchard, WA
I had true dual 2.5" and loved it.
You don't need 3". In fact, you don't want 3". The stock manifolds are 2-1/4. If you're going true duals, why would you go 3/4" bigger than what the manifold has room for? Go 2-1/2", it will flow better than 3".
Or, get a turbo.
You don't need 3". In fact, you don't want 3". The stock manifolds are 2-1/4. If you're going true duals, why would you go 3/4" bigger than what the manifold has room for? Go 2-1/2", it will flow better than 3".
Or, get a turbo.
Postmaster
Joined: Dec 2011
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But yes, a turbo makes a /world/ of difference, and even if you use the extra power, your mileage won't go down very much. And if you can use cruise control, you can easily get better mileage.
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