3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.

FD Pill Part Number

Old 01-22-19, 10:53 PM
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FD Pill Part Number

Hi all,
I seem to be boosting off the wastegate (something like 7-5-7) and read that it likely is caused by missing pills in the pre-control and wastegate lines. I want the extra boost, but I also don't want to go away from the stock parts on the car. I thought I saw it somewhere on the forum at some point, but I can't seem to find the part numbers anymore. Does anyone know where I could get them or does anyone have any they are willing to sell? Thanks!
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Old 01-22-19, 11:30 PM
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The pills are in the vacuum hoses.


I ordered these back in 2010 when I ran in stock class.

edited for photo

Last edited by BLUE TII; 01-22-19 at 11:33 PM.
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Old 01-23-19, 09:33 AM
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Mazda still has these
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Old 01-23-19, 07:00 PM
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Only the earlier FDs had pills in the hoses. Because unknowing people would replace the hoses and throw them away, then boost would be messed up.
Thus later years (?) had them built into the 2 metal tubes.
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Old 01-24-19, 08:24 AM
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I used carburetor jets to replace some of mine. Just match the hole size as close as possible. I don't remember which ones I used.
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