Try a better intake manifold, bored throttle body, internal work like a aftermarket cam, forged pistons..etc..etc..Vtec controller, spark plugs, fuel rail, fuel pump, cam gear, crankshaft pullies, headers, Aftermarket ECU's , short shifter..staged clutch...etc..etc..the list goes on for after market parts.... if you don't to spend a lump some just improve on your current engine...there are alot of people who didn't do a swap or run a turbo with decent 1/4 times... but still it's all about how much you want to spend...$$$ IMO it's about who can write the bigger check and how to spend it.