@ Fyq
Once i got the other tappet cover painted with local paint, local thinner and a good hardener. But it got BROWN by the heat of the engine bay.Like paint been burnt, Now for this, i,ve use imported paint, imported thinner and imported hardener, Till now its been around 10 days still there is no burning sign (BROWN) anywhere in the tappet cover, and i hope this stays the same.
@ Aaali,
Regarding the mushroom. Toyota and Honda engines go well with highflow intake with CNG, whereas Hyundai engines dont. I,ve got a santro as well. Highflow intakes dont work with Santro CNG.