These are the reproductions of the high performance manifolds. They will also replace standard performance manifolds if the head pipes of the exhaust sytem are modified. 

Includes casting number 2843992 and pentastar as original. Pentastar is stamped upside down, just as the original was. 

Per California Law (Prop 65) we are required to put the following warning on all our listings.

WARNING: This product can expose you to chemicals, including lead, which is known to the state of California to cause cancer, birth defects, or other reproductive harm.
For more information visit the Prop 65 site online