JM_16v
Member
Registered: 17th Oct 05
Location: Essex Drives: GLC63S
User status: Offline
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for accleration
4-2-1
or 4-1
any help and where to get em would be gd
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vaux-tech
Member
Registered: 28th May 06
Location: Preston, Lancs. Drives: Astra SRI turbo.
User status: Offline
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tbh for acceleration, i'd say 4-2-1 because if theres 2 exit points for the gases instead of just 1, they'll get out alot faster.
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JM_16v
Member
Registered: 17th Oct 05
Location: Essex Drives: GLC63S
User status: Offline
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http://cgi.ebay.co.uk/Vauxhall-Corsa-B-Tigra-1-4-1-6-16v-Exhaust-Manifold_W0QQitemZ8070450024QQcategoryZ38786QQrdZ1QQcmdZViewItem anyone else
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ed
Member
Registered: 10th Sep 03
User status: Offline
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4-1 = more power at high RPM with a narrower torque band
4-2-1 = wider torque band throughout the rev range but slightly less power.
For road use a 4-2-1 is the only choice 
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