The only potential benefit you will gain from leaving the lid off is noise. If you leave the lid off, the intake will be pulling hot engine bay air in, which you do not want. Leaving the lid on will be best for performance and will be much quieter.
Hatch Nation #90
'12 SE Sport 5Dr |╠╬╝|Sterling Grey Metallic|203a|Moonroof|17" Paint/Mach Whls|K&N 57S-4000|FFE RMM|Steeda STB, RSB|JBR bushings
'01 ZX3|╠╬╝|Pitch Black|Prem. pkg.|Moonroof|SVT Snorkel|SVT Springs|S2 Dampers|Steeda STS|Magnaflow exh.
Last edited by TboneZX3; 09-11-2012 at 02:27 PM.