Worth it in what regard? More power?...yes, especially if you get a header
with the longest possible primary tubes, about 36", and as equal length as
Save gas?...maybe, but never pay for itself.
Forget about miracles from drop-in air filter elements. A K&N FIPK-type
intake offers a boost at full throttle high rpms, but very little for your
money otherwise. Most so-called performance mufflers offer more noise than
performance gains. Exhaust pipes that are too big in diameter will reduce
low and mid range power.
I think this newsgroup needs a repository site. Less than 2 years ago
there was a large discussion about whether K/N was an airflow
improvement. That discussion ended the same way the one before it did,
and the same way the next one will most likely end the same. The k/n
system is not as good as the stock. (The hooker header is good on older
Toys. That's just my experience on a 76 celica notchback, which is
probably still annihilating the streets of Boston today) Anyway, no
intake system has bettered the stock. Ask MTD, ask any of the old hands
( if they can quit playing politics), we've been thru this. keep your
stock intake. save the cash for a trd header/exhaust. If you gotta go
cheap, try to replicate the trd system.
i'd have to disagree... simply swapping out oem muffler with a
glass-pack/magnaflow combo will improve hp/torque/mpg.
a complete breathing upgrade (airbox,intake,cats,header,mufflers) will
require a ECU re-program to take full advantage of the upgrades (which most
do not do).
Ken is correct.
open exhaust with 2 devices both being true open devices. a non-louvered
glasspack followed by something like a Magnaflow. keep OEM internal tube
sizes. the longer you can fit the better to knock out noise. replace cats
with hi-flo ones. a header is good. focus on opening your airbox (saves $$$
and does a very good job of letting engine pull air easier). you can use K&N
just keep it clean and oiled PROPERLY (too much oil will get MAF dirty and
too little oil lets in too much dirt).
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