I am debating about buying a cold air intake K&N / AEM or a muffler. I know both can help, but which would give me better performance? Is the stock muffler efficient enough? I feel the need for a little deeper more agressive rumble underneath, any ideas on affordable quality mufflers? Thanks.
Best upgrades for a stock 03 Eclipse GTS ???
Mar 07, 2007
1 Replies
Both will have a marginal effect on performance (eg K&N will give "UP TO 10% more hp"), while making more (pleasant) induction noise and "rumble underneath". More audible engine noise will feel like more performance, and there's nothing wrong with that.
K&N allows more air in, a less restrictive muffler allows exhaust out a bit faster. So, the correct sequence of mods might be
a) replace the entire exhaust with a 1/2" bigger system with a free flow cat and a header system. b) add a K&N c) update your suspension and brakes to be ready for more hp d) replace the existing non-programmable ECU with a programmable system eg Motec. e) injectors, cams, turbo?
You won't see any major performance until d).
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