as title states i want to know what the power difference of a 4-1 header on my gsr as opposed to a 4-2-1 header. ive heard 4-1 headers are better for vtec engines b/c of the better flow, but i hate scraping all around town.. so if its not that much of a power difference, i might switch over to 4-2-1 headers. my bolt-ons realted to this are, my skunk2 2nd gen IM, CAI, and greddy evo2 exhaust w/ str8 pipe.

all input welcome! thanks in advance