These ported exhaust manifolds are a cost-effective alternative to buying headers for your 3100 or 3400 powered car.  They are ported as much as they can safely be without making them excessively weak, based off of the thickness of the metal around the flange.  These PEM's will increase exhaust flow improving horsepower and torque while reducing power-robbing knock retard.Get yours today!

Please allow 15+ business days for your ported exhaust manifolds to ship once cores are received.

Because it is very common to break the little exhaust shield bolts off when removing them, we no longer charge charge a fee to remove these bolts by reducing the refunded core charge amount, as the machining costs quickly outweigh the core value.  What this means though is that it's also possible that when we ship out ported exhaust manifolds that they are going to have broken bolts in them.  These will not affect their installation to the cylinder heads, but could affect the installation of the heat shield(s) if you intend on using them again.