Hi

If i remove the secondery cats. but leave the front cats and res. will i gain a little power or sound? Some one told me i might loss hp any truth in that?

Bev

 

i got rid to the secondary cats and the resonators. I put a 3 inch straight pipe instead, it was a bad decision because i lost low end torque, both the banks were independent.
now i have put a x pipe in the system and the car has regained the torque.
you can remove the cats and factory H pipe but make sure you put a x pipe as close to the headers as possible.

 

How much power is gained from this mod and dou you by chance have a sound/video clip?

 

www.fabspeed.com

 

I just had my secondary cats and resonator removed on Monday. I honestly don't feel any difference but the sound is a vast improvement. Definitely more growl coming out the back but still quiet inside the cabin. I decided against the x and h pipes and ran 3" straight pipes. I was beating my buddy with a stock E55 at the track on Tuesday so I'm not worried about "losing" anything.

 

im just wondering why the x pipe should be closer to the headers.
does it really make more tq if they are closer to the front?

im running a catless system and my xpipe is near the back, in place of the resonators.
is there anything wrong with having it that way?

 

What about if i just cut off the 2 cats and fit 2 pipes in there places and leave the stock H pipe ? will that work fine ?

 

are you talking about the resonator?

 

stock H pipe is below the "headers" and right before the secondary cats. I cut my secondaries off in between the H pipe and cats. And put in straights. No loss in torque. Im putting down over 550 rwt with my mods

 

Are we allowed to remove secondary cats and resonators in California? Will it pass smog. Yeah our emission laws suck same with the gun laws.

 

Indiana is super chill. I have no requirement for smog tests and I've got a .45 under the seat.

 

my .40 fits nicely in the door =)

 

haha, that's awesome. I like mine in the door under the seat b/c it doesn't move around.