PhattyDre16

When I first bought my car, I was under the assumption that K&N was the greatest thing to happen to cold air intakes, so I purchased one for my 2005 GT. The gain was noticeable but I wanted more, so I got a Brenspeed tune for that specific intake, running on 93. That definitely hit the sweet spot, and I was able to run a 13.3 with that set up as well as underdrive pulleys.

However,

It has always bothered me that my intake did NOT require a tune, so I recently sold my K&N and will be purchasing a JLT (or something like that) along with having Brenspeed retune for it.

I guess my question is this: Do you guys see a big difference from switching these intakes? Has anyone dynoed their mustang with the JLT intake and Brenspeed tune? What numbers did you get? Thanks in advance.

PHX8839

From what I hear it shouldn't make much difference. I believe the only reason you NEED a tune is if you change the diameter of the intake at the sensor. I have the Airaid intake which has a sleeve that fits in to maintain the stock diameter which can be removed if the proper tune is done. Regardless of brand a tune will greatly benefit any cold air intake, but most of the major brands should preform about the same.

Nuke

There will be a minor difference but probably not enough to be measured by the butt dyno. If you see an additional 4 or 5 RWHP, I'd be surprised.

brad281

I'm happy with my jlt and brenspeed tune. I would not do the trade in unless you got quite a good price for the K&N. It's all about preferrence. The JLT and tune is better than the K&N, but truly by how much we may not know?

PhattyDre16

does anyone have dyno numbers for the brenspeed and JLT tunes? Or even C&L.

808muscle

I wouldnt expect much. The tune is where the real gains are, but since you have already sold the k&n just get the jlt and install it.

patrick

SirKnightTG

I felt and heard a very big difference between my tuned K&N CAI and Steeda CAI.

As a matter of fact, the new 110mm JLT gives 10 - 15 rwhp more than the typical 90mm (like the Steeda, FRPP, etc) on an otherwise stock GT. So yes you'll see a difference between the tiny K&N and the new one.

onederful100

i switched from K&N to JLT with only the canned livewire tune
on the dyno i picked up 10rwhp
with the K&N i had 291 hp, and with the JLT 301, nothing else was changed
both were using the canned tune from the SCT livewire

NeoTokyo

Did you dyno on the same day? If not the same day was it the same dyno?

10rwhp is just enough in the margin of error of the dyno combined with ambient temps and humidity.

If it was done on the same dyno, same day (within a close period of time) then 10rwhp is more verifiably accurate.