Description of Flowtech 91945 1FLT Shorty Smog Headers
Mandrel-bent tubing for smooth exhaust flow. Sturdy 16 gauge tubing. Extra thick 3/8 flanges for a leak-free seal. Designed as a direct fit replacement for OEM exhaust manifolds. Will accommodate all emission control devices.
and although I still have some leakage. The manifold on the driver's side was rubbing against the brake booster. I'm still checking if it will hurt him because of the heat.