Longtubes will produce more torque and HP throughout the entire HP range. Whether it's modified or stock you will notice a difference. There were some guys on the corral that had their cars dynoed with longtubes (previously had shorties) but their cars had heads, cam, intake. One guy gained like 30 ft lbs of torque at 2500 (his biggest gain) and 15+ ft lbs at peak power. He gained about 5-7 HP at peak. Others reported similar gains. I will be installing my longtubes soon and will track test it and possibly dyno it.
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3.55 gears, short shifter, BBK headers, Mac Pro Chamber, Mac Cat Back, C&L mass air, Nitto DR's, Nitrous Works nitrous 50-175
Best ET's:
14.14 @ 98 NA
13.46 @ 104 80 shot
with a worn traction lok and 60's in the 2.12-2.2 range.
Up next: Longtubes, short belt and a new differential
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