the upper hole is for downpipe rite.
But my foreman seal it n din use it. Juz use the exhaust hole.
Why do like tat a ? But i still can use the fish-tank to adjuz boost.
what is the best tire for 165/55/14 cause very hard to find, ask around have so many answer. i am just driving a "SLK" only.... pls share, still a noob in this area. thanks
recently only i find out that the boost that i had set on my HKS EVC1, which was at 1.4bar..was actually not achievable on my 1st and 2nd gear..... on 3rd ,4th and 5th yess i could achieve that...