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Old 05-27-2014, 09:50 AM   #1
Silver_Stang_05
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Vehicle: 2005, Mustang, Roush
Location: Florida
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Default Straight Pipes on 05 GT damaging?

have an 05 stage one Roush with stock headers, K&N intake, pypes x-pipe deleted cats and FRPP's. I took the FRPP's off yesterday to see what it would sound like. It's LOUD! and I like it. I'm concerned that running basically straight pipes will cause harm to the engine with there being no back pressure at all. Have heard off valves burning, running rich, fouling out plugs. Before I take her over to the local muffler shop to weld straight to the back wanted some advice from people here about this setup. My other thought is to run Flowmaster super 10's??

here's what it sounds like. There's some reverb from the garage, will get better vid today.

https://www.youtube.com/watch?v=1dCi...ature=youtu.be
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2005 Roush Stage 1 - K&N Intake - Painted Calipers - 18% Charcoal Tint side/back - 70% Solar Tint Windshield - Pypes X-Pipe - Gutted Cats - Strut Tower Bar - Sr Performance Lowering Springs - BBR Adjustable Panhard Bar - 18x10 Bullitt Rims 285/18 Michelin Pilot Sport

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Old 06-29-2014, 01:32 PM   #2
84CopperGT
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Vehicle: 1984 Mustang GT
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Default

Quote:
Originally Posted by Silver_Stang_05 View Post
have an 05 stage one Roush with stock headers, K&N intake, pypes x-pipe deleted cats and FRPP's. I took the FRPP's off yesterday to see what it would sound like. It's LOUD! and I like it. I'm concerned that running basically straight pipes will cause harm to the engine with there being no back pressure at all. Have heard off valves burning, running rich, fouling out plugs. Before I take her over to the local muffler shop to weld straight to the back wanted some advice from people here about this setup. My other thought is to run Flowmaster super 10's??

here's what it sounds like. There's some reverb from the garage, will get better vid today.

https://www.youtube.com/watch?v=1dCi...ature=youtu.be

I have had straight pipes on many of my cars and never had issues like those. I guess if you have a carbed car you could run lean and burn a valve up but on a fuel injected car I highly doubt it. All of the things mentioned are more likely to happen from a bad tune than straight pipes. If you want loud go with Cherry Bomb Extremes, they are cheaper than Flow 10s and sound the same
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1989 5.0 LX vert auto. Rear cats removed, flow 50s replaced with straight pipes. Quieter with no drone than with the Flow 50s.
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Old 06-29-2014, 01:32 PM
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