SKU: 22831759886

MACE PLENUM SPACER AND MANIFOLD INSULATOR COMBO PACK TO SUIT HOLDEN CALAIS VE SIDI LLT 3.6L V6

Sale price$93.60 Regular price$104.00
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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28

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Description

MACE PLENUM SPACER AND MANIFOLD INSULATOR COMBO PACK TO SUIT HOLDEN CALAIS VE SIDI LLT 3.6L V6Installing either an insulator or a spacer on an engine such as the LLT definitely has its merits but to combine the two components, the gains are truly unrivaled when it comes to budget performance. By increasing the plenum chamber volume with the spacer and lengthening the intake runner length with the insulator, the volumetric efficiency of the motor is improved by a noticeable margin over the entire rev range. These parts are manufactured from a

Installing either an insulator or a spacer on an engine such as the LLT definitely has its merits but to combine the two components, the gains are truly unrivaled when it comes to budget performance. By increasing the plenum chamber volume with the spacer and lengthening the intake runner length with the insulator, the volumetric efficiency of the motor is improved by a noticeable margin over the entire rev range.

These parts are manufactured from a thermo-composite plastic so not only do they provide the benefits already mentioned, but also prevent the manifold from heat-soaking, which maintains a cooler charge air temperature and generates a higher resistance to knock. The result is sustained horsepower gains and crisp-like throttle response.

With all the "bolt on" parts there are available today, these by far are the easiest to fit and arguably yield the greatest results all without the need of an expensive engine re-calibration. We also have packages to accommodate any engine setup or space requirements; catering for forced induction, naturally aspirated and everything in between. We're sure we'll have a combination you'll be exceptionally satisfied with.

 

Contents:

  • 1 X Manifold insulator kit
  • 1 X Plenum spacerkit

Vehicle Fitment Guide


Parts Guide

Please select the part number you require from the variation by utilising our vehicle fitment guide and parts guide.

Notes:
  • Any combination where the plenum spacer is thicker than the insulator should be used on forced induction only.
  • Due to the substantial increase in height, the combinations with a 25mm manifold insulatorwill require minor modification to ensure proper fitment under the bonnet. The plastic cowling will need to be trimmed and a section of the bonnet lining will have to be cut out. A re-stocking fee will apply if under bonnet clearance is misjudged and a kit needs to be returned/exchanged.
  • Please take any necessary measurements prior to purchase. We will not be held responsible for any clearance issues you may have as every vehicle is made with slight differences.
  • If you have any concerns regarding installation, refer to ourKnowledge Base.Fitting instructions are also available on our website.
  • If space allows, a combination of a 12mm plenum spacer with a 6.35mm manifold insulator for forced induction and a 12mm plenum spacer with a 25mm manifold insulator for a naturally aspirated setup, is ideal.
  • These components can be purchased separately through other listings.
  • The image is for illustrative purposes only.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 22831759886

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4.5 ★★★★★
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J
Verified Purchase
Jospeh C Farrell
Birmingham, US
★★★★★ 5
Boating maintenance
Perfect replacement parts for your scheduled maintenance, great price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 25, 2025
J
Verified Purchase
Jeff Sylvester
Chelsea, US
★★★★★ 5
worked great at fair price
works fine on my 1994 volvo penta 3.0 GL the main gasket was wrong, but my 3.0 GL does not have a gasket, the other parts appear to be universal
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2025
G
Verified Purchase
gmarlin
Carnegie, US
★★★★★ 4
Good fit
Worked well with no problems.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
A
Verified Purchase
andranik g.
Pawtucket, US
★★★★★ 5
Great replacement kit
Called around for quotes to get them replaced and everyone was quoting over $2k just for bellows. Figured I’d give it a try. The rubber is good quality and feels soft. Time will tell but this is an easy job if you’re mechanically inclined. Make sure you replace the plastic water pickup fitting while you’re at it. Found mine to be cracked on disassembly and had to wait for a new one. Should be a easy 3-4 hour job if your not doing the bearing and only doing bellows
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2024
B
Verified Purchase
Ben
Carnegie, US
★★★★★ 3
Just ok
Qualities OK, but for Marine applications might want better
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2025

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