Are cat backs all sound or do they make HP?
#2
Are cat backs all sound or do they make HP?
I doubt anyone has paid dyno fees for only a catback because dyno time is expensive. I'd be inclined to say no not on a modern car as they are tuned well from the factory. However there are dozens of write-ups on hi flow cats. Most make no difference at all and some are downright dangerous to the motor if you have mods like nitrous or forced induction. It's not uncommon for aftermarket cats to clog or melt under boost/ nitrous and destroy a motor. Ford did a really good job on engineering the cats unless your running crazy numbers I doubt you'll even notice the difference.
#5
Some cat backs come with an x-pipe (true cat back), wouldnt those make some power? Assuming someone wants to keep the factory cats in place and use shorty headers that would be the best choice right?
Anyone know what kind of power is made from shorties + X pipe cat back?
Anyone know what kind of power is made from shorties + X pipe cat back?
#7
Shorty headers (retains stock cats) ~5hp
X-pipe resonator delete (retains stock cats) ~5hp
Catbacks/axlebacks (retains stock cats) ~0-5hp
Complete system from manifolds back with LT headers, midpipe, catbacks, and tune ~20-25hp
X-pipe resonator delete (retains stock cats) ~5hp
Catbacks/axlebacks (retains stock cats) ~0-5hp
Complete system from manifolds back with LT headers, midpipe, catbacks, and tune ~20-25hp
#8
A cat back system alone ain't giving you 25 ponies, period.
#9