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What are manifold insulators? What do they do? How do they work?

MACE

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One of the questions we quite frequently get asked are, What are manifold insulators? What do they do? How do they work?

Here's a link that can provide a better understanding of real world benefits this modification can make on the dyno, down the strip and through day-to-day driving.

http://www.autospeed.com/cms/article.html?&A=110474

And, NO! Our insulators and spacers are not made from timber lol

110474.jpg

 

commodore665

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The insulators do work, with a CAI the combination works better
 

scaredyet

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Is it a good idea to change the spark plugs while the top is off? I have a VZ and got the 12mm also should I put in new coils even if mine are fine?
 

MACE

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Is it a good idea to change the spark plugs while the top is off? I have a VZ and got the 12mm also should I put in new coils even if mine are fine?
It would depend on how many kilometres your car has done to on the current set of plugs be honest. If they have travelled over 80% of their service life, then it would be a good idea to replace them. The fact that the insulators are reusable though, you're not obligated to having to do the plugs at the same time as you install the insulator.

If you have any more questions please don't hesitate to ask.

Kindest Regards,
Steve
 

scaredyet

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Sweet. I might as well change them out while it's off
 

Fu Manchu

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Is there a reason the spacers are designed without the notches for factory gaskets?

It concerns me using these with silicon sealers, that if ever silicon finds its way through and into the cats, it can do quite a bit of harm to them. I've recently read some Holden tech info on damage to cats from silicons.

I have the spacers on two cars and enjoy the subtle improvements in the way the car feels.

I have one manifold off and was thinking of drilling a notch to allow factory gaskets to be used instead of silicone sealant.
A pity they don't come like that. It would be a better finish to the product when using factory designed gaskets.
 

keith reed

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Are they made for the vn v8?
 

Immortality

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No, nothing like this to suit the 304 unfortunately.
 
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