The BLOX Racing Hi-Flo header is specifically designed for Honda B-series engines with 1.6L - 1.9L in displacement
The BLOX Racing Hi-Flo header is a 2-piece, 4-2-2-1 design and features innovative step-up exhaust tubing, TIG-welded stainless steel tubing and flanges and true 2.5" exhaust collector.
Specifications - Step-up Piping Sizes
1.6" - 40.6mm
1.8" - 45.7mm
2.0" - 50.8mm
2.5" - 65mm
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