You would be much better off leaving the factory exhaust and just adding in high flow cats.
Of the few options available (most are aware of the two companies which offer HFC systems) many, not all, are failing/blowing out. These systems are $1500.00 upwards towards $3000.00 shipped. Also factor in a possible CEL, although rare, it can happen. I was going to go this route and save for one, but I have changed my mind and purchased a used Borla ATAK system which I will try to match up with the Corsa Helix double XX already on the car. I want it louder but not willing to spend $3000.00 and see it possibly fail.
The Borla is loud. Just threw up a cold start video.how much louder are the borla attack mufflers versus the stock gt350R mufflers? Trying to decide if I want to pull the trigger on a cat-back.
my car is still under warranty so I donāt wanna mess with the cats just yet but Iāll look into it. If you donāt keep the Borla Iāll most likely take it off your hands.
There are two options for high flow cats. B-Line motorsports (300 cell count and they make in house to handle even boosted applications compared to their previous Gen 1 high-flow cats that were not made in house), or Fabspeed 200 cell count High Flow cats. These are about $1000 more expensive than the B-Line but utilize the best HJS cats from Germany. Both of these applications do not have CEL's - you run into this in applications without cats. As far as this compared to the Borla you will not pick up any gains from the Borla compared to the high flow cats (cats are the limiting factor for the factory exhaust - heads are ported from factory). I have never been a fan of borla x pipes as they look poorly designed, but if you wanted to use Corsa with the factory mufflers I again don't see the point in time/effort for only this.my car is still under warranty so I donāt wanna mess with the cats just yet but Iāll look into it. If you donāt keep the Borla Iāll most likely take it off your hands.
From my understanding the OP is looking for more volume not HP/TQ gains. Both options have experienced failures. The most expensive one is the most disappointing since they make them for high end super cars. They have failed on the street and at the track, which was reported by one of the first buyers, just a few weeks after his install. Both advertise if you experience CEL's to call them to work out a solution, so the possibility is there. No one has reported if they will pass emissions testing so far. They probably will but might not as well. They main thing w/ both of them is more sound, more hp/tq, no tune needed and reported to not cause CEL's. But would advise against them because of the cost and failures. Too much to have them fail, especially weeks later after install. No excuse for that at all given a price tag of $3k.
Also Hiflow cats are illegal in CA, computer would probably pick up then changes and could mess up SMOG.my car is still under warranty so I donāt wanna mess with the cats just yet but Iāll look into it. If you donāt keep the Borla Iāll most likely take it off your hands.
Thanks , but Iām not looking for HP gains Iām pretty good with the car as is , Iām asking more about sound. I donāt think corsa comes with a valved option so thatās a no go for me.
Do you have any sound clips?
