![Porsche 911 Turbo (996/997) Big Bore (45mm) Manifolds Porsche 911 Turbo (996/997) Big Bore (45mm) Manifolds](https://cdn11.bigcommerce.com/s-ublhigbe0h/images/stencil/300x300/products/580/1538/100081_1_png-800x800__41795.1696322244.png?c=1)
![Porsche 911 Turbo (996/997) Big Bore (45mm) Manifolds Porsche 911 Turbo (996/997) Big Bore (45mm) Manifolds](https://cdn11.bigcommerce.com/s-ublhigbe0h/images/stencil/original/products/580/1536/100081_3_png-800x800__78720.1696322244.png?c=1)
These 42.7MM bore size manifolds are ideal for the 911 Porsche Turbo in order to enhance sound and flows; and are one of our fastest selling and most popular products, with a fantastic appearance and proven gains. With a sleek brushed finish, we are certain that you will be delighted with the result. The manifolds upgrade from the 38MM OE and are ideal as either a direct replacement or in conjunction with one of our exhaust systems for 996 or 997 Turbo. The increased bore size translates to more free-flowing engine gases, leading to performance gains in terms of both HP and Torque.