Stuart,
Please keep us posted when you receive confirmation that the car can be tuned with the 200 sport cats to successfully make it through an OBDII emissions test. I don't want to have to swap out down pipes back and forth every 2 years. I'll install them with the L.T. headers when those become available.

 

The video turned out great. The car sounds awesome but it's still even better in person! It really is amazing how much difference these make. Well worth every penny.

Thanks again Stuart, still no complaints whatsoever. I couldn't be happier.

 

We can do this now in terms of the sensor codes. The part about 'making it through an OBDII emissions test' is something I'll never guarantee as I'm not intimately familiar with each area's procedures.

If you want them to be able to plug into OBDII and not see any codes, and see sensor readiness we can do this.

 

Stuart that V6 S sounds glorious. Your going to make my wallet lighter cause I'm wanting those cats and tune for mine now.

 

It's pretty nice hey? Email me at stuart@velocityap.com and we will sort you out!

 

Done. Bought the 200 cell cats and tuner from Stuart. I'll be installing them within the next two weeks and will give a review once done. Thanks Stuart and I can't wait!

 

Some video clips from a customer, running stock exhaust with 200 Cell Sport Cats, VelocityAP ECU Tune & Pulley:

https://www.youtube.com/watch?v=rVGGElrQEYs

https://youtu.be/rVGGElrQEYs

https://youtu.be/8h1EGOh3aBY

https://youtu.be/RcKDT3fi7Ow

 

Stuart,
That car needs stiffer springs and dampeners.

 

Wish the cold start sounded more controlled and refined w/ the stock exhaust. I personally cringe every time I start it in the morning. Once its warm though, it sounds like pretty damn awesome.

 

I'm on the fence for doing software because of warranty issue. But ...
im interested in keeping the stock exhaust and somehow making the exhaust note even louder. Is this possible and can it be done without software modification.
Thank you.

 

On a V6, you can straight pipe the center resonator. On a V8 that resonator is removed already and has an XPipe. So your only options are:

A. Sport Cats
B. Aftermarket Exhaust
C. Modify the stock exhaust - you could cut out windows in the central chamber, replace the 'valve open' resonator with straight pipe (cut/weld in) and then weld the casing back on.

 

If I do the sport cats will it trigger the check engine light or another type of engine warning light . Doing this, will it require software. I suspect it wpuld need a software update.
Thank you !

 

Stuart,
I had the central muffler on my XFR chopped out and replaced with an H-pipe, which allowed the XFR-S tune to stick and also improved the sound a little.
Is there any performance to be gained on the F-Type V6 by putting in an X-pipe or H-pipe, especially with your tune?
And what difference if any would it make to the exhaust note?

 

Well the purpose of the x-pipe (or H-pipe) is to balance out the uneven exhaust pulses in the V8, the V8's have an uneven firing order with two cylinders on each bank firing in succession. If you can imagine it fires; right, left, right, right, left, right, left, left and that sequential firing on the bank kind of doubles up the exhaust pulse down that pipe, the x-pipe, h-pipe (call it a crossover) relieves some of that pressure by balancing it out down the other exhaust pipe.



The V6 on the other hand is even fire; right, left, right, left, right, left so you don't have the same big pulses of exhaust.

I think an x-pipe will change the sound on a V6, but I don't think it'll bring any measurable performance gains, not like the V8's where they do really make a difference...

 

It would get slightly louder if you replaced the resonator with an X or H Pipe, but I would be surprised if you picked up a ton of performance, for the reasons Cambo articulated.

The software and/or crank pulley are the big gainers on the V6.

 

Will installing the sport cats trigger the check engine light? Or is it good to go without software adjustment.
Thank you.

 

Sport cat will require software adjustment.

 

I don't believe I've seen this anywhere.. Is there any increase in power/torque with the sports cats?

 

We haven't been able to dyno as a standalone modification, but based on the header results I would say minimal. That being said, what we know 100% is that leaving optimal condition peak dyno runs aside, in real world conditions, these cars VERY quickly default to primary & secondary enrichment tables based on cat temperatures. Even more so when tuned & pulley added. So by running the sport cats, we see cat temperatures drop and people are able to run their cars off the optimal fueling strategy for longer. So it's not so much a question of gains as preventing losses. If that makes sense.

 

Mine made about 20-25 hp with vaps cats and new tune.