**NO LONGER AVAILABLE**Big Mouth Manifold***NO LONGER AVAILABLE********
*NO LONGER AVAILABLE**For the 85-92 TPI engines the stock manifold barely adequate for a stock engine. If you have a modified engine, you really need something better. The Big Mouth is a simple bolt-on and uses all the same hardware and fittings as the stock TPI manifold. This intake makes 15-20 HP on a stock or mild 350. Even more with large tube runners and a bigger throttle body.