say bye bye to your first cat

You guys will need to extend your 1st 02 sensor and have a thread welded after the flex pipe

Easy process...

Nice to see an RPW representative on the site
wink

 

Longuer primary tubes will usualy give you more torque versus shorter ones on headers with identical collecteor and tube size
larger primary tubes will give you increased high rpm
collector size and shape will also play a major role in header performance
take a look at headman headers, hooker header,burn'S stainless they all have be making headers for a long time so you'll find good info on their site even if it'S not hyundai specific

Denis

 

Yes the 1st cat is removed as is the option of the 2nd cat and both are replaced with a high flowing larger cat.

Will bolt up to the balance of the origonal exhaust / modified exhaust.

We supply O2 fittings in our flex pipes for all oxygen sensors as well as a 2nd fitting after the new HFC cat to make teh car run better.

Correct longer pipes of equal diameter will promote more torque at lower rpms but not inhibit flow and hence a 4-1 design which outperforms a 4-2-1