JBA 1527S Shorty Header, SS, 00-06 Wrangler

The JBA 1527S is a shorty-style header for 2000-2006 Jeep Wrangler models with the 4.0L inline six, built to bolt on in place of the stock exhaust manifold using 1 1/2-inch mandrel-bent stainless steel tubing.

What it is for

A shorty header replaces the factory manifold's restrictive castings with larger, smoother tubing that routes exhaust gas out more freely, and JBA pairs the tubes here with its own Firecone collector design. The flanges are machined from 3/8-inch stock and the collector domes are built extra thick, with factory-style emissions connections retained so the stock sensors and hardware still locate correctly.

What to check before buying

Confirm your Wrangler is a 2000-2006 model with the 4.0L engine, since this header is sized for that specific application. JBA lists this part as C.A.R.B. exempt under Executive Order D-57-33, which is relevant if you are in a state that checks for that exemption.

What comes with it

The header ships as a direct replacement for the factory manifold with an installation hardware kit included, so you are not separately sourcing gaskets or fasteners for the swap.

Common questions

Does it include installation hardware? Yes, a hardware kit is included for a direct swap onto the factory manifold location.

What is it built from? Mandrel-bent stainless steel tubing with 3/8-inch machined flanges.