SpdPilot said:98cobra4.6 said:tama said:you'll lose unless he can't drive worth a shit. get 4:30's, full exuast, some asp pullies, and delete your IMRC's and get a tune.
These are secondary runners in the intake that open at 3200rpm and allow a lot more air to flow into the engine. The are butterfly type blades that open. Much like the secondaries on carb'd engines.
I did a lot of research into benefits of deleting them on my car. Not worth it on a non - supercharged/turbo'd Cobra. They are worth cleaning, but a lot of work to do so. I am going to do mine. Do a search on the net and you find a couple articles about cleaning them.
they're not worth deleting unless you have a set of 4:30's and plan on getting a tune. It'll help.