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FS: Custom RB25 Plenum

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EXP19 Enthusiast

EXP19

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JD Custom made it on calaisturbo.com.au

he designed it

bellmouths inside

hav been proven that they pick up a fair bit more power n torque

his 1st ones he made leaned out in 5 and 6 as it was a square back, this is a taper back and it works like a charm!!

JimX Grand Master

JimX

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yeah i know these plenums work, many guys on calais turbo.com.au have had great sucess with them, they are larger and eliminate the curved runners, increasing flow efficiency

I don't know if these things get much more outright power, but they do help eliminate a fair bit of heatsoak that most standard intakes on RB20/25's suffer from. That might be enough to give you a little bit more power and reduce leaning out slightly, but I find the better purpose of these plenums is to improve throttle response. I have a home-made, unscientific one and I don't suffer from any leaning out. I would get a more professional one if I was racing it or had more money, but for mild mods I don't think anyone is going to have any problems with this plenum.

If you're considering buying it, do it for the better throttle response, which is why I did it and I don't regret it at all.

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