hondata intake manifold gaskets are a nice upgrade as they sheild the intake manifold from engine heat and increase the plenum length slightly
i use a hondata gasket every time now - they are worth the extra dollars

alot of rally cars etc use thick intake manifold gaskets - but they are usually made of crazy good materials and are hand made and cost ALOT of money
so far the hondata unit is the only one i have seen that doesnt leak/scratch and actually gives results

http://www.ebay.com.au/itm/HONDATA-I...item5d2f026ade