Hello!

Our system is completely modular. This means that you can mix any match any of our components with any of the stock pieces.

If you have factory PSE mufflers, we even have specific replacment PSE mufflers that will work with your PSE tips.

 

I have X51 headers, AWE cats and Borla cans and I had no loss in low end torque that I could feel and here's the reason why. Now lets for the sake of debate there is a low end torque loss of 5-8ft/lbs at 3500-4000rpm. The issue now becomes will you be aware of it...when you drive and are digging into the throttle see where you end up in the tach when you complete the shift..most likely it will be above this rpm. Also, AWE shows a slight torque loss with their headers very low in the tach range vs. no headers but with thier cats and mufflers. The added midrange and topend charge of the headers more than make up for any perceived or real loss at the bottom of the tach. Once again where are you on the completion of your shift. If you bought headers to just putz around at low rpm than whats the point? I can assure you as a whole system goes you will still make more hp and torque than you would with the OEM setup.

Dave

 

It may be something psychological related to significantly increased noise level. I also felt initially that I had less low end torque after I got fabspeed x-pipe and maxflos - but on dyno charts compared to stock curves I saw no changes whatsoever on curves under 3K rpm. Everything above got a boost, but low end segment did not really change at all.

As now I run with stock mufflers again I just can say that I started to press in accelerator harder at low speeds than before when engine was roaring much louder. That gives a 'feel' that you have 'more' torque but in reality I just open throttle wider than before.

Overall differences I could notice now with stock mufflers are minimal compared to sport mufflers, may be, just may be that strong pull force after 6K rpm is slightly less than before, but in low rpm segment I cannot say I noticed anything to be different. IMHO mufflers really do not change anything power wise at all.

 

Good post, but as you saw with your own eyes there is no loss at the low end from the dyno's you did. As far as hearing gives you that psychological effect of more poiwer, that doesn't work for me. It could be that 20 years of drag racing and modding cars you get tuned in pretty well on what the car is doing. I had the headers and mufflers on the car before I installed the cats and to be honest I felt no gain at all. It wasn't until I did the cats did I say "wow".

Dave