3rd cat delete

[chrisday1990]

Just had the third cat swapped out for a Milltek bypass on my v6 emira. Noticed a slightly deeper tone, but nowhere near the difference I expected given how restrictive that cat looks. Curious what’s everyone else’s experience after doing this mod?

 

[SenecaEmira]

The difference is mostly noticeable above 4k RPM

 

[sixtyy]

Yeah. Very noticeable for me. I also have the jb4 tune, which makes it a little louder.

 

[chrisday1990]

Yes it’s like a deeper sound… i do get the odd crack and pop now

 

[RyanGphoto]

Yes it’s like a deeper sound… i do get the odd crack and pop now

The valve controller makes a MUCH bigger difference as you can leave the valves open 100% of the time and that is where you will get the cracks an burbles.. I did both of those for a friend and the valve controller was a much bigger difference. Why not do that?

 

[Steve24]

What about people for whom the sound is not important?

I’m about to buy the cat delete as well, but I want it for the (supposed) sharper throttle response, small gain in power and less weight.

Does the cat delete actually achieve those things or is it really just something that makes the car a bit louder?

 

[Orchardbike]

It saves a couple of Kg’s. There is a small gain in power around 5-8% I believe and it’s slightly louder/deeper in sound.

 

[NicolasB]

It saves a couple of Kg’s. There is a small gain in power around 5-8% I believe and it’s slightly louder/deeper in sound.

5-8%? Maybe 5hp, but you won't feel it unless you are superhuman in your senses.

 

[Pdl2thmdl]

I don't have the valve controller installed but have the delete. sounds the same under 4k under normal driving conditions, which is what I wanted. very civil until you go above 4k and especially wide open throttle the thing screams. it makes those moments more special for me vs having it just loud all the time. I can't notice a difference in performance.

 

[allenyao09]

I agree the valve controller makes a much bigger difference in volume. The cat delete change the tone of the exhaust on higher revs.