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Old 05-21-2001, 01:06   #1 (permalink)
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Herrod Motorsport Headers/Big Bore

Can you describe the complete Herrod Header / big bore arrangement for an XR8 AUII. System I anm thinking of- take off twin system, Y junction and single pipe with 2? mufflers. Add VX style oval tail pipe.
Has there been a proper dyno test on the system. Standard is 200kw (stated, and hopefully not the same as a 4.6L Ford Mustang recall power figure- we all know about this!).

I'd really like to know
1.What is the increase in power tested on calibrated dyno.
2. Economy - better or worse (who cares really, but good to know)
3. Noise factor - is it noisey, does it drone (headache after 4 - 10 hours driving).
Many thanks for any input.
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Old 05-21-2001, 01:10   #2 (permalink)
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PS please - not interested in supercharging - yes its good but not yet - just want to know about totally standard car and Herrods exhaust with K&N filter only.
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Old 08-16-2001, 02:13   #3 (permalink)
el2 xr8
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I have an el xr8 series 2 it has herrod system fromthe cats back sounds great a bit of droan at about 1800rpm under trottle but i quite like that beffy v8 sound.
Pulled 136kw at whells whitsh i was told is just short of 200kw at fly wheel.
cost was $800 want to get the rest done now its about $1200 for genie extractors and cats from the guru in melb????
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