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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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#1 |
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Gains from aftermarket catted front pipe vs stock front pipe?
Title kind of says it all. Currently run a catless front pipe with a q300 catback, but will be getting a catless UEL. I wonder if it's worth getting a high flow catted front pipe, or just putting the stock on back on.
Does anyone know of any dyno runs comparing the two? |
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With the tremendous response I guess it's safe to save a few bucks and put the stocker back on!
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There's a HFC thread where the stock front pipe is being scrutinized as restrictive. So I'm going to bump this to see if anyone knows of any dyno data backing this up.
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Nameless claims 3-5 HP and tq across the board by switching the front/over pipe over full stock.
By looking at I would expect some power loss vs a full exhaust if you put it back on.
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Perrin claims about 6-8whp by swapping the front pipe from stock to their (now discontinued) catted front pipe.
The difference between a test pipe and a HFC is minimal, but compared to an OEM cat you'll see quite a difference.
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