View Full Version : I ported my Stock manifold

Q8 6.2
05-16-11, 09:27 AM
today I got my car back we have ported my stock exhaust manifold I didn't want LT headers as I didn't want to loose low end torque.

Let me say car feels fantastic I am soo happy i can feel it's responding much better and i feel its much faster in the lower gears and for the first time today when I scratch third gear car went side way I didn't believ it as before it never did that.

I will take it to the dyno Tonight.. my last dyno the car made 494 hp and around 485 torque i feel it made alot will see

05-16-11, 09:29 AM
So the dyno will be of you fully stock and than with only ported manifolds ? Pics ?

Q8 6.2
05-16-11, 09:35 AM
No the last dyno I had 9.5 pulley , cutback and cold air I remember my stock dyno was around 445 hp car was new

05-16-11, 11:39 AM
That's great!! I never heard of porting the stock manifolds. I'd like to know more information and find out the cost etc..

05-16-11, 01:47 PM
Did you have the exhaust manifolds ported or extrude honed? For those of you who don't know about extrude honing:


Q8 6.2
05-16-11, 05:36 PM
went to dyno shop it was very busy 4 cars infront of me so i left will do it when i get free time maybe tomorow.. a i can tell you after more driving i feel this car came alive suddenly the rpm clime so fast and its much more responce i love it i think at least 30-40 more torque

aj 660 i went to a marine racing shop he says he did it alot to racing boats manifolds and water passage maybe you should look for performance marine shop he also says it took 4 hours to do it maybe you can call one of the high quality shops like d3 see if they have extra manifold they can port so you can do the swap in one day then send them you manifold.

JOEYCTSV i dont know what the name is but he has special machine with all size they did it by hand i think

kyle's v
05-16-11, 08:56 PM
I did this on my Ram SRT-10 and was very pleased with the results!! Here's a few pic's... Also had them ceramic coated as well..

05-16-11, 09:48 PM

05-17-11, 12:19 PM
Extrude honing was on Phx list of stuff to do. We'll likely do a set (my car) and let you guys know the findings.

Good mod Q8.


05-17-11, 08:39 PM
Looks like a nice mod. I have a set of LS2 manifolds from my 05 GTO, are these the same manifolds as the V? Anyone know the part numbers for our manifolds?

05-18-11, 10:42 AM
What process / method did you use to port and hone the exhaust manifold?