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Has anybody tried harpell auto fab race mufflers?

I've looked all over for pics an 03/04 engine completely done in AN fittings and braided hose. Ive seen several with the fuel lines. I'm speaking more about the cooling system. Anyone have pics post them please

I have looked but can't really find the answer. What is a normal drop in fuel rail pressure on an 04 with a 2.8 pulley. Or should there not be a drop at all. Example. Wot pull as soon as I hit the throttle I see a lean spike for a hundredth of a second then as it starts to come down I see the...

Looking at getting speedhuts stand alone A/F wideband. Has anyone had these? Are they ok? It says you don't have to calibrate them. Haven't seen any post about them. It's supposed to come with gauge, sensor, bung, built in controller and has .5v output for data logging. Sent from my Pixel 3 XL...

I am curious to know if anyone has went against the grain? Installed aftermarket gauges other than white face. If so pics would be awesome. Sent from my Pixel 3 XL using the svtperformance.com mobile app

Not entirely new but new to being a member. Just bought my 4th mustang and second cobra a couple months ago. 86 GT, 95 GT, 96 laser pink Cobra still have her and just got black 04. I've enjoyed the community, hope it stays active. Sent from my Pixel 3 XL using Tapatalk