Gutting the cat (thanks Blanchy)

Wolf Adams

Wolf Adams

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Hey guys,
with the Suono on the way its time to start thinking about getting that ridiculous stock exhaust off of there.

What does gutting the cat do for me?

Pros/Cons?
 
Check local laws but if there's no emissions testing, you should be OK. I'm with Tony though... this is one of those things that if you do it, you cannot put it back. It might be worth it to just get the Arrow headers and park your stock headers for safe keeping. You'll run fine with the CAT until you save for the Arrow headers.

Of course going this route, you really *should* have a Power Commander to install at the same time.
 
is there any REAL HP advantage to cutting the cat? Ive seen that a slip on adds 5-7HP, but is there another boost w/the cat cutted?
 
3B43 said:
is there any REAL HP advantage to cutting the cat? Ive seen that a slip on adds 5-7HP, but is there another boost w/the cat cutted?
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I don't think it adds to the overall HP of the bike but makes more of those HP available to you at certain RPMs. Think of it as shifting the HP to where it wasn't previously abundant. ;)

This is from Wikipedia so it may not be 100% factual:

Many automotive companies offer aftermarket exhaust system upgrades as a subcategory of engine tuning. This is often fairly expensive as it usually includes replacing the entire exhaust manifold or other large components. These upgrades however can significantly improve engine performance and do this through means of two main principles:

  • By reducing the exhaust back pressure, engine power is increased in four-stroke engines
  • By reducing the amount of heat from the exhaust being lost into the underbonnet area. This reduces the underbonnet temperature and consequently lowers the intake manifold temperature, increasing power. This also has positive side effect of preventing heat-sensitive components from being damaged. Furthermore, keeping the heat in the exhaust gases speeds these up, therefore reducing back pressure as well.

Back pressure is most commonly reduced by replacing exhaust manifolds with headers, which have smoother bends and normally wider pipe diameters.
Exhaust Heat Management is the term that describes reducing the amount of exhaust heat loss. One dominant solution to aftermarket upgraders is the use of a ceramic coating applied via thermal spraying. This not only reduces heat loss and lessens back pressure, but provides an effective way to protect the exhaust system from wear and tear, thermal degradation and corrosion.
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