Austin Healey 100M Exhaust Header / ManifoldFits all Austin Healey 100's (BN1 and BN2) Based on the 3 branch manifold designs for the Austin Healey 100M. Uprated to a 2 inch outlet for increased gas flow and added performance! Manufactured in high quality, thick gauge mild steel pipe to reduce noise levels Finished in heat proof paint. INCLUDES BIG BORE EXHAUST MANIFOLD GASKET. All pipes are shaped by the mandrel bending process so the bore (and gas flow) is not reduced. MILD STEEL Made in the