6 Boost Nissan RB25/30DET (DOHC) Forward Position Promod Exhaust Manifold

6 Boost Nissan RB25/30DET (DOHC) Forward Position Promod Exhaust Manifold

Marsoni

M251S

$874.13

Get it in 3 business days with 1 day shipping. Friday, May 29

6 Boost Nissan RB25/30DET (DOHC) Forward Position Promod Exhaust ManifoldAll 6Boost manifolds are individually hand made in Australia. They are specifically designed for your application and built around unique "merge collector" design. This means no pipes cross each other and the merge collector directs all exhaust gases at the turbine entry. We have these to suit many combinations, if you don't see the combination you require in our selection please email and we can have one custom made for you. Additional Extra's

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Your 6 Boost Nissan RB25/30DET (DOHC) Forward Position Promod Exhaust Manifold orders ship within 1-2 business days.

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Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
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Got this to replace cabin air filter on 2020 Honda Civic Sport, as it said it was a direct fit… It does fit but not perfectly! Holding it next to the filter you can see the size difference, with the original being slightly longer. I noticed a whistling sound from the AC at full blast right after install. I believe this noise is caused by the small gap left in the retainer box with the slightly smaller filter. Luckily it is not incredibly loud, but it’s still there. The quality of filtration seems to be much better than stock filter, but the fitment not exact for vehicles mentioned above.

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Reviewed in the United States on May 17, 2026

Verified Purchase

Bon43

Birmingham, US

★★★★★ 5

Awesome

Easy to install. Fit appropriately. Value for the money for sure.

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Reviewed in the United States on September 26, 2025