I have the JWT short ram and a muffler delete. As far as the sri's being able to be heard... that is a definite not lol.. the exhaust is ungodly loud and you won't be able to hear the intake unless you have much better hearing than I do lol.
The SRI's have shown gains and losses on different people's vehicles. Personally I couldn't tell you if mine lost or gained power other than my butt dyno which says I have gained a little power. As far as sucking in hot air... when I am moving my IAT's are between 10-15 degrees higher than ambient temp and I don't even have the heat shields installed. I'm not sure how much over or under the ambient temp the long-tubes bring in but 10-15 degrees above really isn't bad.
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