Question on cat installation

[Kens1992mtxSHO]

I know it's kind of a dumb question, and I know the heat shield faces up... but does it matter which direction that cat is installed in???

 

[SASHO91]

heat sheild is supposed to be down. Some cats have flow arrows on them... or labeled inlet/outlet. But unless noted, I don't think it matters.

 

[yamahaSHO]

Josh, the heat sheild goes up. Heat goes up and your car is what you're trying to protect.

As stated above, cats generally have arrows for flow direction.

 

[SASHO91]

Hmmm... thought the heat sheild was there to stop grass from catching fire....

my bad.

 

[Kens1992mtxSHO]

Who drives regularly on the grass???

All instructions I see says heat shield up. My question is once the shield is up does it matter which way the cat is mounted?

 

[yamahaSHO]

Hmmm... thought the heat sheild was there to stop grass from catching fire....

my bad.

Who drives regularly on the grass???

That's exactly what my next question/answer was going to be.

All instructions I see says heat shield up. My question is once the shield is up does it matter which way the cat is mounted?

Look at that cat a little. Mine have arrows to indicate flow. I have high flow cats, however, if you do not have high flow cats, it may not matter on the flow.

 

[SASHO91]

oh forget it.....

 

[Kens1992mtxSHO]

I didn't see any arrows, but I will look a little closer. Thanks for your help guys!

 

[yamahaSHO]

oh forget it.....

Eh???

 

[AREA 91]

Who drives regularly on the grass???

Cheach and Chong!!!!!!!!!!

If there's only 1 heat shield, put it between the pipe and underside of the car. Suprised that there isn't heat shields on both sides.

 

[yamahaSHO]

Who drives regularly on the grass???

Cheach and Chong!!!!!!!!!!

If there's only 1 heat shield, put it between the pipe and underside of the car. Suprised that there isn't heat shields on both sides.

It would have a hard time cooling if there were heat shields on both sides. You'd be holding the heat in which probably make quick work of the honeycomb.

 

[Shoaz]

FWIW, I put mine on with the shields down at first (because of the grass concern) and then realized that that was backwards.

When cats first came out there were a lot of instances of people setting fields on fire by driving through tall grass. I think there've been some redesigns/re-engineering since then, but it's a legitimate concern. Caught me out as well.

But, yeah, the shields go up.