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2005 Nissan Frontier Nismo Compare

4. Here you can see the differences between the OE exhaust manifold and the JBA headers. Notice how the factory units combine two shorter tubes into one, versus the JBA headers, which use a collector flange and (almost) equal-length tubes for each cylinder. This helps smooth out exhaust flow and subsequent performance.
2005 Nissan Frontier Nismo Exhaust - Project Nismo Frontier

 4. Here you can see the differences between the OE exhaust manifold and the JBA headers. Notice how the factory units combine two shorter tubes into one, versus the JBA headers, which use a collector flange and (almost) equal-length tubes for each cylinder. This helps smooth out exhaust flow and subsequent performance.  View Related Article

 

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