Exhaust Kits, Mufflers & Accessories
Recommended Exhaust Tubing Sizes
This information was supplied by
Flowmaster. It's intended as a basic
reference guide to give you an idea of the general exhaust-pipe size
needed to balance the prevention of excessive backpressure while
maintaining adequate exhaust-gas velocity.
|
Engine Displacement
|
H.P.
|
Pipe Diam, Single
|
Pipe Diam, Dual
|
|
150-200
|
100
|
2.0
|
2.0
|
|
|
150
|
2.25
|
2.0
|
|
|
200
|
2.5
|
2.0
|
|
200-250
|
150
|
2.25
|
2.0
|
|
|
200
|
2.5
|
2.0
|
|
|
250
|
2.5
|
2.25
|
|
250-300
|
200
|
2.5
|
2.0
|
|
|
250
|
2.5
|
2.25
|
|
|
300
|
3
|
2.5
|
|
300-350
|
250
|
3.0
|
2.25
|
|
|
300
|
3.0
|
2.5
|
|
|
350
|
3.5
|
2.5
|
|
350-400
|
300
|
3.0
|
2.5
|
|
|
350
|
3.5
|
2.5
|
|
|
400
|
4.0
|
3.0
|
|
400-450
|
350
|
3.5
|
2.5
|
|
|
400
|
4.0
|
3.0
|
|
|
450
|
4.0
|
3.0
|
|
450-500
|
400
|
4.5
|
3.5
|
|
|
450
|
4.5
|
3.5
|
|
|
500
|
4.5
|
3.5
|
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