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Posts: 1
| I have a 98 Cummins Turbo Diesel. Empty it get about 26-28 mpg, towing about 20-22. My friend wants to put a Strait Pipe on it..says it will get even better mileage. Is this true? And what are some good/bad things about strait pipes? |
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Posts: 15
| What you are getting mpg is excellent mpg. Let him straight pipe the mighty cummins and you will regret it. You have your truck to pull with. I don't think you bought it to ride around in. |
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Posts: 94
Location: high desert, CA. | 
Straight pipes are for young boys....who like to make a lot of noise, and have everyone look at them.
Put that pipe on your truck, and the mighty Cummins will roar like a blooming banshee. And it will probably wreck your hearing in no time.
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Posts: 2
| Possibly, but not always. Removing restrictions in the exhaust system can reduce backpressure, which may improve engine efficiency slightly. However, your Cummins is already a turbocharged diesel, and the factory exhaust isn’t overly restrictive. Any gains would likely be minimal (1-2 MPG at best). |
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Strait Pipe??
