Exh Manifolds Dual Chevy 194-230-250-292
Simply the best dual exhaust manifolds you will find for Chevy 194-215-230-250-292.
Heavy casting. Great finish. Made of Ductile Iron (higher steel content), not cast iron. These can be welded with stick or wire welding because they are made from ductile iron.
Made to fit ALL chassis that came with these engines from the factory (except as noted below)
Only offering these in coated.
Made to fit 2 1/4 " head pipes.
Hardware kit is included. Heavy gauge flanges
When installing, be sure to remove the threading in pins at front and rear of head at int/exh flange. Use a large pair visegrips to unscrew them. Use a short threaded stud in place.
Last picture is a example of the pipe (you supply) gasket and flange.
Recommended parts to go with these.
Heat plate if using Offy or stock intake
Fitment issues
These will not fit a Integral head engine.
62-67 Chevy II Nova with a stick shift. The Z bar will need modified to clear the rear manifold.
47-54 Chevy pickup- front manifold will need to have flange cut, reclocked to clear steering box. We have instructions for proper modification on 47-54 pickups. contact us
THESE MANIFOLDS ARE INTENDED FOR RACING PURPOSES & SHOULD BE INSTALLED IN ACCORDANCE w/ STATE REGULATIONS PERTAINING TO EMISSION STANDARDS. IT IS ALSO RECOMMENDED THAT ALL SMOG CONTROL & CATALYTIC CONVERTERS BE RETAINED AS REQUIRED BY LAW. CALIFORNIA VEHICLE CODE SECTION 27156 PROHIBITS THE ADVERTISING, OFFERING FOR SALE, OR INSTALLATION OF ANY DEVICE WHICH MODIFIES A VEHICLE’S EMISSION CONTROL SYSTEM. 12Bolt LLC Duals HAVE NOT YET RECEIVED AN EXEMPTION FROM THIS CODE SECTION, & ARE, THEREFORE, NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON VEHICLES EQUIPPED w/ CATALYTIC CONVERTERS.
1. The stock intake and Offy intake need to be trimmed to share 2 bolts.
2. It is best to heat the intake using water heat, we offer a heat plate to do this.
3. Take time to orient, position and maybe file the clamps to properly clamp intake/ exhaust equally.
