I already got the Larini exhaust, just installed Larini Sport Cat today, but did not notice any difference in sound. Any thought? Maybe I should reset the computer?

thanks

 

What year is your car? Resetting the computer won't change the sound at all.

 

Larini is so loud that it can't get any louder??

 

2011 Vantage Roadster

 

That's why, 2010+ have cats built into the headers too. You just removed the secondaries

 

Agreed. Changing the secondaries will make some difference, but nowhere near as dramatic as on the pre-2010 cars where you are changing primaries as well.

If you want to go louder with that exhaust, you'll need to change the headers out as well.

 

thanks, any suggestions or I better sale it becasue there is not much difference.

 

You could take them off and drill out the catalysts so they are just test pipes, not sure how much additional volume that will achieve because I'm not sure if Larini makes 100 or 200 cell cats for those cars.

Other than that, if you upgrade to headers with single 200 cell secondaries like on the earlier MY cars, you should see a pretty sizeable jump in sound, along with some HP but it depends if you want to get that involved.

 

Ya upgrading headers and running high flow secondaries is the only real way but that's much more invasive.

Realistically what you could do is keep your stock header and primaries and just run cat bypass for secondaries (straight pipes), as long as there are no 02 sensors rear of the secondaries you should be good as far as CEL goes. Straight pipes would be cheap

 

Agreed, don't modify the existing stock headers, because if you ever have to do emissions, or want to sell the car to someone where they require emissions - then you'll need them and I imagine they are a small fortune to buy as replacement parts.

If you want more tone, replace the muffler in the back with a sports exhaust....

 

^^^^ First sentence he said was that he already has a Larini exhaust.

 

thank you so much guys, I will keep the header. Maybe sell the cat later.