Headers or 1.8 Roller Rockers - Ford Mustang Forum
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post #1 of 4 (permalink) Old 04-23-2006 Thread Starter
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Arrow Headers or 1.8 Roller Rockers

I wanted to do gears, but I don't want to lose gas mileage on the freeway. I was looking into installing either headers (long tube or shorty), or 1.8 roller rockers.
-Some companies claim 15-17 hp from 1.8 RR, but in reality its most likely 5-8hp tops.
-Some companies claim that headers will bring 15-17 hp, however, some say that the car will lose torque/power because backpressure is lost.

What mod would be better?

Current mods-
2004 3.9L/Auto
-Mac CAI/73mm Mass Air/Insulated(gets cold!)
-Dual Flowmaster 40s, H pipe (2.25 in pipe)
-42% Underdrive
-SCT Tuned

2004 3.9L/auto
-Mac CAI, 73mm Mass Air
-Dual Flowmaster 40s, H pipe, 2.25 in pipe
-42% Underdrive Pulleys
-SCT Tuned
-4.10 Gears & Trac-lok
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post #2 of 4 (permalink) Old 04-23-2006
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I would say go long tubes. IN essence you car will operate more efficently and if you keep your foot out of it gas milage should increase. Plus the sound difference will be very pleasing.

2006 Mustang GT in Torch Red
C&L Intake, Evolution Performance Tune, Borla Axle Backs, Hurst Shifter, 4.10's, JBA Long Tubes, Prothane Engine Mounts, Steeda UDPs, FRPP Charge Motion Delete Plates

84 Bronco, 302 C6 on 32 10.50's
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post #3 of 4 (permalink) Old 04-23-2006
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Headers are a PITA to install, RR are quite easier, just watch the torque settings.

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post #4 of 4 (permalink) Old 04-23-2006
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unless you have some engine mods the headers won't help and could hurt you as far as HP and torque go

1998 V6
1987 GT
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