Installation Time: Full Day
October 29, 2015
always the best fit
I always recommend Pypes headers ever since first installing them on the 3V motors on the 05 and up. these headers are the same quality and fit as those were. the install was very straight forward and as expected really. the only issue that we encountered was the header bolts that were uncured with the headers were the wrong thread pitch so we had to reinstall the studs in the places we had planned to use the bolts. also, we cut ball of the header off to and used a 3 bolt flange for a better seal and fit. there was nothing wrong with the design but we have discovered that there are occurences where over time the bolt system that most of these headers use do tend to work loose. not always, but it does happen. the fit and finish is spot on though, as is always the case when we install Pypes products.
the exhaust note now that the headers are installed and everything is hooked up as it should be is just simply indescribable in the best ways. down low it sounds like a standard V8 but above about 4k it sounds like a totally different machiblne. it almost has a V10 note to it now, definitely was not expecting that. just so you know, the mufflers/resonators on this car were not bought, but made. that could account for the exhaust note but I'm pretty sure I've heard other 5.0s that had a similar sound.
now for the power gains. based on the classic butt dyno, this car has gained a lot of power. I'm very impressed with how it has changed. I would love to have a had a before and after dyno pull but we didn't have the chance. it definitely feels different though. the pull in first and second is scary because of how much it's changed. and hooking it up on street is a thing of the past now.
overall though these are the best headers you are going to find for this price, perhaps at any price. if you have the time to install them, get them. it is definitely a full day install but we tend to be very meticulous as well.