MikeS http://www.ebay.co.uk/itm/VAUXHALL-ASTRA-22L-16V-Z22SE-PERFORMANCE-EXHAUST-MANIFOLD-DECAT-41-/171184926610
evocarlos thats quite cheap 🙂 you could buy one cut it off below the lambda plug and fit the right size pipe 🙂
m4rtin I agree with Simon, does look a bit weak. However could also turn out to be a great buy! Don't think it could handle supercharged powerrrr tho?
evocarlos m4rtin said: I agree with Simon, does look a bit weak. However could also turn out to be a great buy! Don't think it could handle supercharged powerrrr tho? it would but it would be cherry red 98.9% of the time 🙂 it would also need an appropriate size down pipe say 2.5" tbf for supercharger use it would be better to use the standard cast manifold and a good down pipe tired and tested 🙂
steve2761 what sort of size is this over stock??? got the usual crack in my cast unit.COULD be a cheap upgrade if performance goes up over stock.will have to see if they do vec b one.bearing in mind I'm sticking na for the future at present.
MikeS JA exhausts been around a long long time carlos for £250 you cant complain though, £200 cheaper than another manifold that has suffered with cracks also Would be interesting to see if there would be any increase in torque from using that
evocarlos MikeS said: JA exhausts been around a long long time carlos for £250 you cant complain though, £200 cheaper than another manifold that has suffered with cracks also Would be interesting to see if there would be any increase in torque from using that no you right i did say its a good price but they could of taken the time to make it a better part with a bigger down pipe 🙂 the cast manifolds only crack when theres a precat fitted hence why vx removed it after 02 🙂
MikeS Not always carlos as I have seen them crack without precat, just heat and vibration have you tried ringing them and asking for a 2.5" downpipe, I am tempted myself to go decat
evocarlos ive not seen any crack yet 🙂 i will be going stainless got a deal with powerflow cause of that shat pipe i had made but need to drive to doncaster to get a full 3" system built
MikeS vectra B suffer with most cracked manifolds I found flexi is in a different position so that might be wh, also the vectra B did not have the engine mount on the front of the bell housing