Specifications and Features: ARTEC Twin 3.5" RB26DETT Stock Frame Front Pipe Dyno tested and proven, the biggest, highest-flowing direct bolt-on RB26 front pipe available for stock-frame turbo setups. Features our 80 mm ID 2-bolt cast-to-3.5Ó flanges, allowing this behemoth to bolt straight up to OEM RB26 dump pipes or aftermarket options including our high-flow ARTEC dumps. Fully compatible with the factory catalytic converter or aftermarket high-flow, emissions-compliant cats. Constructed from 3.5Ó 304 stainless steel piping and incorporating a single flex in the front dump section of the Y-pipe for flexibility. Recommend for OEM block-to-dump braces to be retained. Includes new nuts, bolts and gaskets, everything you need to bolt it right up. Package Contents: 1 x Nissan RB26 Twin 3.5" Stock Frame Front Pipe 3 x Gaskets 6 x Bolts & Nuts