Remove muffler without a re-tune?

[Darrenb10]

Hey guys. I have a 335 kw bf with a full exhaust system with standard rear muffler. Just wondering if I take the rear muffler will it affect my tune or will it need a re tune after cheers

[k31th]

The rear muffler is fine to change for a straight pipe or a higher flow muffler.

[Puffwagon]

It's a modified ve tuned car and might not take ve changes well. It will lean out a bit. 

 

You might need a touch up and you might not. 

 

Ask your tuner. 

[Darrenb10]

No worries thanks guys

[Rab]

Yeah - stock rear is fine to ditch, doesn't change the flow

 

Built system.... who knows

[Puffwagon]

A stock tune has heaps of fuel.

 

A tuned car could already be at 12.5:1 up top and might not like being a couple of points leaner.

 

It's a timing/fuel trade off around this area.

[Box stock T.]

What this guy said ^^^^

delete pipe or more free flowing system may need a tickle up on the tune.

I brought this same question up with my tuna..

Definitely worth giving ya tuna a quick buzz, especially since ya up in the 330+ range.