Thank-you! Just wait until we make a set in Inconel 625! That kind of thing makes me weep, not tears of joy but tears of sorrow.... that it has to be put on a car instead of a wall!

 

Stuart, I am with Millsjq on this. I have the sports setup courtesy of the N420 and find the sound level just right. Any more volume would leave longet stints in the car as being a bit overbearing. How much of the gains are contributed by the hi flo cats, thats the question.
Right now my exh. valves open around 3300 rpms. This is a nice threshold as I can cruise around quietly but still dip into performance fun quickly. Set much higher and I would lose some fun!

ps, thanks so much for your help today, very kind.

 

Kline makes some incredible exhausts you made a wise choise going with this manufacturer.

 

the 200 cell cats are very livable so long as you don't lay into the throttle. in normal driving, they're not terribly loud at all - just a wonderful, aggressive growl. unless you're getting up toward redline, you shouldn't be bothered by increased loudness. i have 200 cell cats and a sport exhaust and i get compliments constantly on how my car sounds. in case it matters: my exhaust deletes the valves so the sound builds linearly, not much sudden burst from the valves opening, and i prefer it this way!

 

My pleasure!

The high-flow cats do account for a good chunk of power, and being that they are simpler and easier to install, they are very good bang for the buck. It does add some additional expense, but adding a sports exhaust allows you to add or subtract silencing to your preferences, so we certainly can produce quieter silencers to keep the sound level exactly where each customer wants it (and of course, drop some weight at the same time.) That's not going to be for everyone, but there's definitely plenty of options out there, either through valve mapping or rear muffler setup to get it in the 'sweet spot.'

 

Ditto ditto ditto! You can modulate the dbs quite nicely with your right foot. It can be well behaved or it can be a beast. I like being able to choose. Was at the track today and again, nothing but spontaneous compliments on the sound of the car.

 

Hi Guys

Just wanted to point out that it was my car that had those new Velocity manifolds fitted. If you remember, I previously posted a V8 vantage power upgrade thread. Given Stuart has already posted the dyno/power increase info I thought I would just add a little bit of info on how it drives!!

Firstly, the mid-range torque is much better. Basically you can go anywhere in 4th gear now, no need to downshift when overtaking or wanting a burst of torque. Secondly, it does get scary on higher revs, almost to the point that I may be looking to upgrade brakes very soon!! I took my younger brother out in it today who has been with me in my previous car many times (a Porsche 997 C2S) and he said it was definitely felt faster!! Just his opinion so please don't shoot the messenger Porsche fans!

Here is a clip of my brother driving my car. The exhaust sound is immense (this is with the windows up!!)

http://www.youtube.com/watch?v=QwDvc...ature=youtu.be

 

Darn, that sounds amazing!

 

Damn! Sounds like an old WWII fighter plate! Well done

 

Another set of our fabulous equal-length V8 Vantage Manifolds left the shop today enroute to a happy customer in Switzerland.

 

Too bad they look crap.

 

Correct me if I am wrong but your design looks more like a shorty header while the stock ones look more long tube (even though they have a lot of restrictions). Sorry just what it looks like based on the images.

Just a question on the collector, have you guys tested if a prefabbed smooth port one is better that the one you offer? Again based off images it looks like the welds are in there disturbing smooth air flow.

Just wondering based of images.

 

I know, right? I wish they looked half decent...

 

The equal lenght primaries in our design are longer than the longest primary in the OEM setup, and MUCH longer than the shortest one. The OEM is sort of a 4-2-1 although considering that the '2' part is really only 1/2 a pipe each I'm not sure that it really is.

By 'pre-fabbed smooth port' I'm assuming you mean a formed collector rather than the fabricated merge collector we use? A formed collector will produce less power than a built merge collector does. This has been tested and confirmed (although not by Velocity.) Formed collectors are cheaper because they are 'prefab' but the airflow does not merge as effectively.

The welds inside the collector barely disturb the airflow at all, certainly whatever tiny disruptions they cause are nowhere near the same level of effect that a prefab formed collector has on the airflow so although more costly and time consuming, the merge collectors we use are a superior part for this application.

 

Thanks Stuart for the reply. Was basing my post of pictures only. Will be in touch soon =)