Anybody install these? Was it a big difference in performance? Would you do it again? What are the benefits? So many questions because by the time I include tax and the gasket kit I am at $526.00!! A lot of dough, but if it made a difference, I would somewhat understand. Please offer advice as soon as you can. Carmyne

 

The main benefit is that it won't crack. If yours hasn't shrunk and cracked yet you don't really need it.

The HTT one is cheaper and comes assembled.

 

HTT???What, where, and how much?

 

http://www.htturbo.com/

 

I have one. My stocker shrunk, broke bolts and cracked. I noticed very little difference in EGTs. Could tell no difference in power.

 

I read some where that the stock manifold flowed better

 

Only time I broke any Manifold Bolts was on the Dyno at 53lbs of boost and at 1000Ftlbs of torque. It snaped the heads off of 3 bolts and they were like little Rockets. I have had the manifold off a fw times and it has not seemed to have shrunk any. Are there certain years that are prone to shrinkage more than others?