will removing the rear mufflers increase performance?

I mean the ones at the very rear. Also, Is the exhaust on the gs400 similar to ls400?

 

Removing the rear mufflers will not increase performance from what i know of..
I Did remove the two rear Resonators on my 1991 LS400.

But what years are you talking about in the GS to LS Comparison??

 

No, only noise. There 2 resonators, not to be confused with cats, and 3 mufflers. Try unbolting the mufflers at the rear axle and tie them up out of the way of the exhaust, rev the engine a few times and see if it's for you.

What's your definition of similar? Yes, their both V8s, yes they both have y-pipes with dual exhaust. The GS400 and later model LSs got a higher, I believe 10.4:1, which increased the power, as well as the introduction of VVT-i.

 

Are there not 3 Cats, 2 Resonators, and 2 Mufflers..?

At least that is how mine was.

 

Yeah same with my car. California cars have a 3rd catalytic converter in place of the 3rd resonator found on non-CA cars.

 

Now is the 3rd Cat needed?? Or can i get that S*** Cut off?? i was thinking about it but i was thinking it might affect the Smog status...

 

some UCF10s had a 3rd cat, but not all. you could probably ditch it without adverse effects but for smog....who knws.

 

removing the 2 resonators and that 3rd cat is Ok Passed smog easily

 

Just run open headers, you will probably lose power down low but gain it uptop and it will sound great!

 

Sorry, I didn't know Cali cars had a 3rd cat, now I do.

 

Now that would be loud.

 

just run a cutout

 

this would help how exactly....?

 

dont do any of the mentioned above. messing with the back pressure of the exhaust will eventually(it will take a while but it will happen) start bending your valves. just get a custom exhaust from a muffler shop. they can tuck it up for you so it can be hidden if you would like.

 

How would reduced back pressure bend valves Exactly...? I Have never heard of this happening. any links to articles or info on this??