Upgrade your Honda Civic Si 2/4DR 2006-11 K20 with the Tsudo FA5 FG2 Stainless 4-2-1 Race Header. Experience boosted torque and mid-range power through the true 4-2-1 design. Effortless bolt-on installation using standard hand tools, no welding/cutting needed. Compatible with stock and stock-style mid-pipes, including Tsudo S2 cat-back system.
- Stainless steel: rust-free, maximum durability.
- Includes new hardware and Tsudo CEL Fix
- Reuse stock header gasket for superior sealing.
- Racing header for off-road or track use only
