thanks Adrian. i did try running my hands down the manifold to try feel for it but nothing. I guess i will jack the car up to have a better look from undernealth. It's irritates me to look at the ITC and have the knock value at "1".
car is being mod for the occasional trackwork. For the engine department, i have got ARC intercooler with pipings, Trust oil cooler, Trust sump, JUN adj exh/int cam gears, new belts, oil/water pump catch can, crank, twin air pods, avcr and power fc. Induction side, i have R34 GTR turbos pushing a safe 1.1 bar with full turbo-back exhaust system.
Chapmans & Chapmans at Wollongabba did all the engine work/mods for me and Mercury Motorsports did the tuning because they have the datalogit software and also one of SAU_QLD sponsors. Would have preferred Chapmans to do the tune because i have seen some very positive examples of Andrew's work.