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Discussion Starter · #1 · (Edited)
Looking to have my 5AT 04 Tsx reflashed pretty soon been hearing about serge and I know about hondata. Mods I currently have are a intake and an after market exhaust so what would be my best option and what’s the benefits I would get from each? Any help is appreciated.
 

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Since you are not boosting your engine the intake and exhaust mods should have minimal performance gains as you probably already noticed. They are mostly sound and psychological enhancers. With a tune you'll get a more noticeable performance gain as you lower your VTEC rpm. The reflash would be the best option.
 

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For your 04, I recommend adding a header and reflash. The header and reflash will give you the best bang for your buck in terms of power and improved throttle response. Hondata reflash is more accessible, but I hear SergeBo reflash is coming back.

The reflash is only good for Intake/Header/Exhaust. Anything beyond that will need a custom tune, but your ECU doesn’t support that.
 
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