a friend of mine just had his crack too from MAP

 

MAP doesn't make the short runners in house. They will probably crack over time honestly. They are a decent design and make very solid power (i have tested on my car) and the spool is good. Unfortunately the quality is just ok so some will crack. You get what you pay for.

 

They do have a one year warranty guys, and as of right now cracking of these manifolds has been rare. If you have one that has cracked simply submit a support ticket below and we'll get it resolved for you ASAP.

http://www.maperformance.com/support/tickets/contact/