Do you get better MPG with Test pipes or a Spacer?

[Tampa G35 Sedan 6MT]

I am looking at going with test pipes and a spacer but do they give better MPG?

DJ

[telcoman]

I am looking at going with test pipes and a spacer but do they give better MPG?

DJ

Have you tried regular 87 octane?

Telcoman

[Tampa G35 Sedan 6MT]

no really lol

[cheapazz]

I lost alot of everything when I went test pipes. I have since gone to HFC's.

[Tampa G35 Sedan 6MT]

really? How can something that is less restrictive cause worse MPG ?

[Tampa G35 Sedan 6MT]

bump

[Initial_R90]

well i had ti tek test pipes and motordyne on my z seemed to be better off 100% stock everything as far as mpg goes. But if you do want test pipes i have my old ones along with a tanabe y pipe GL LMK

[Tampa G35 Sedan 6MT]

What do you want for them? and do they have the O2 fixes?

DJ

[Initial_R90]

they have the 02 bungs spacer's for check engine light. 150 shipped to your door they were 220 + shipping new

[cheapazz]

I did mine after exhaust and headers. The only thing I can figure is that with the test pipes the ecu isn't getting the right readings so it runs the car rich. No proof, just a guess. My exhaust got alot blacker and so did my car....not to mention my friends telling me that when I punched it black smoke came outta my exhaust. It ran fine just rich...thus the need for the cel fix spacers. Now the only way I drop below 19 mpg is if I go to track day....and no I don't drive like G'ma

[Tampa G35 Sedan 6MT]

We all get black smoke when we punch it! I had a friend tell me the same thing... But i still have my cats in!

DJ

[BrandAidDesignG35]

I think you would find similar results without the test pipes, just do the spacer first, it adds a lot of engine noise in the upper rpms... much more than I expected