The wish of TPI owners is that they could pop on a set of inexpensive Vortec heads for a power boost. But alas, Vortec heads will not simply bolt onto the TPI...until now. Nicky Fowler and his ...

The SuperRam runners are shorter than the TPI runners to increase top-end horsepower ... dollar-per-horsepower advantages of the iron Vortec heads with this new Scoggin-Dickey Vortec TPI manifold.

A Vortec cylinder-head runner is approximately 6 inches long. The total intake track length of the different manifolds varies from approximately 11.75 to 14 inches in comparison to the stock TPI's ...

One exception is the '87'91 Camaro TPI 350 No. 083 head that had full ... 96-and-later L31 Vortec heads (casting Nos. 062 or 906) are superior to any earlier factory design, even '60s muscle ...

So that tradeoff is never beneficial. We did a dyno test of a set of iron Vortec heads without pocket porting compared to an aftermarket set of aluminum heads that had been intentionally ported ...