If you want a super high quality exhaust manifold. PLEASE BUY ONE!!
For the money the ISIS products are great. The ISIS V3 manifold is a great middle ground between the thin walled exhaust manifolds and the high end SCH40 ones. Again, it is your choice as a consumer (cost vs benefit)
If you want an awesome Hand Tiged Manifold, we offer DOC Racing, Synapse, Full Race...etc
http://www.enjukuracing.com/categori...rbo-Manifolds/
These ISIS Manifolds are mig welded SCH40. Then pulsed over with a tig to give it a nicer finish. The pulse can not reach some areas, which is why it looks like its "missing welds".
Sincerely,
Ken Harrison