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.
Great question. This is because we designed the kits to be run without the factory gaskets. In saying this though, there is no reason why the dowels on the factory gaskets can't be trimmed to suit, as the bolts through the manifold insulator and gaskets, ultimately line everything up anyway.
The silicone sealant that we supply is O2 and cat converter safe. Unless an obscene amount of silicone sealant was used, I don't see how there would be an issue, which is indicative by the fact we have never had an issue with these items with the silicone sealant we supply.
Are they made for the vn v8?
Sadly not, but would be possible to make though.
If you have any questions please don't hesitate to ask
Kindest Regards,
Steve