WIRED 41

SWIRL FLAPS The Forge Motorsport Swirl Flap Blank kit allows the removal of the problematic OE swirl flaps in the inlet manifold commonly found in the Vauxhall 1.9 CDTI (Z19DTH), meaning there is no need to replace the existing manifold, instead it can be modified with this kit. It is designed to fit the later design Pierberg manifold (7.00373.12.0) that uses the larger 18.5mm swirl flaps. Once the flaps are removed this kit blocks off the holes that remain. Please note these are not a direct fit to the older design manifold that uses the 15mm swirl flaps, unless the manifold is machined out to accept the larger 18.5mm bungs. It is common for cars that used the older 15mm design manifold from standard have had the manifold replaced to the newer 18.5mm manifold in their life, but your customer will need to check the size of their swirl flaps holes. Once the swirl flaps have been removed of the manifold will now be free flowing. The flap actuation motor should be left on the vehicle, and

connected electrically, but with the lever arm disconnected. This allows the ECU to recognise that the motor is present, and working, and will not cause the EML light to came on. Removal of the flap system often results in a much smoother drive, better fuel economy and most of all future proofs the vehicle against future inlet repairs/problems.

6