Slimline Power Plenum for Weber 500 and 4 barrel carburettors


Due to the universal fitment and multiple applications of this kit, there are no instructions included.

RPi Low-pro Power Plenum, unquestionably the most useful upgrade, and most universal product ever for twin & 4 Barrel Carburettors for Rover and bigger V8's too, especially those with limited bonnet clearance.

At last its arrived, Our unique in house designed 'low pro Power Plenum' system for all 4 barrel Carburetor types. This one, is a bespoke design, in house designed originally for MG V8 applications but suitable for any V8 powered vehicle with limited bonnet clearance
, it also suitable for LPG conversions too.

Thisitem is also suitable for all V8 applications and is designedto give near fuel injected performance from the 4 Barrel carburettorengines even when on LPG.. This is why we call it the 'Power Plenum'. what's more they are hand built and can be modified for any application no matter how limited the bonnet clearance.

Finally, its here!!!
Amulti-use intake system Power plenum that fits all 4 barrel WeberEdelbrock Holly, Carter, & Rochester 2 and 4 barrel Carburettors..and allows for remote air cleaner placement increased low and mid range engine torqueand also is appropriate for simple LPG installation without the power losses normallyassociated with 4 barrel carb systems. This is a truly unique product..

Supplied with all seals to ensure an air tight sealto the Carburettor, plus threaded rod, wing nut and seal, and that'sit that's all you need.

K&N Air Filter Suitable for the power plenum.

We also offer a K&N air filter that is compatible with this power plenum and can also offer our unique stainless steel KN filter shroud too, not included here in, but available separately in our eBay shop, see our other listings or contact us.

Will this fit my vehicle?

This snorkle Power plenum was designed originally forthe MG but is also suitable for 2WD vehicles. This is a slim line PowerPlenum snorkel that is slimmer then the original Power Plenum wedesigned so it can fit to 2wd vehicles with small under bonnet space.

We have provided some pictures below to show you some vehicles that we have upgraded with the power plenum how it looks.

Due to the universal fitment and multiple applications of this kit, there is no instructions included.

What is included in this kit?
  • 1 'Low Pro Power Plenum'
  • We can offer this item in other different styles, please see our other listings or contact us for details.
  • We can also provide, 'one off' designs for vehicles with other limited bonnet clearance issues if required
  • Furthermore we can offer this with or without the design logos on the power plenum as shown in the first image.
  • All gaskets/seals required are included
  • Fittings to include threaded rod, wing nut and seal

(all approx)
  • Diameter of Inlet size is 64mm
  • Diameter of underneath centre 130mm
  • Overall Height 65mm
  • Overall Diameter 241.3mm or 9.5inches

We may also have various other Plenum's in different colours and styles;

  • Gold Powder Coated (not in stock)
  • Silver Powder Coated (not in stock)
  • Alloy (available in both large & small)
  • And Black smooth Powder Coated (not in stock)
  • All of the above various designs can come with or without the power plenum design logo as shown in the first image.


  • Below you can see a picture of a typical smaller power plenum finished with the alloy style. Could be painted to your very own preference or used as is. The sticker is optional and will only be included if specified.

  • Here you can see a few varieties, we may not have all colours available, but can likely provide one off colour options too, please enquire.

  • These two images show some examples of some of the vehicles we have upgraded this power plenum with and how it looks, I am sure you would agree it certainly is a wonderful master piece.

FAQ Zone

  • Is it possible to Visit Rpi. for collection, further information or for parts to be fitted.
    For sure we have many customers from all over the world, that not only visit us but enjoy our unique hospitality, as well as our in-house workshop facilities that can cater for anything from major rebuilds, restorations, engine fittings, LPG conversions. As well as drop in chipping and ignition system upgrades. Holly our Engine builder (Head Chef maybe) can always find the time to show you around the world of V8 Rover engines and explain all variants and upgrades.

  • Whats more, Now with online 'You-Tube'. videos too.
    To help give you the real feel of all we can offer, what we can achieve and the standards we aspire too we now have a space on 'You-Tube' for your enlightenment. ( to afford you a unique, real time snapshot of what you can expect from us. What's more, to see, feel and genuinely experience the passion we have for what we do and what we can do for your V8.

(See our other eBay items)

If you are paying by Paypal or are located outside of the UK, please refer to payment instructions. Please also remember our prices are inclusive of EEC VAT which can be deducted from your final bid price if you have exemption, or delivery of your item is outside the EEC states.

Summary of My Selling Policies
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All items purchased requiring modifications, upgrades, or for the inclusion of additional stock or non stock parts, may be subject to delay, however, you will be notified accordingly.
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RPi Engineering International Ltd.
Wayside Garage,
Holt Road,
NR10 3EE
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Technical specifications