B-Series header features a  4-2-1 Design

Specifications:
4-2-1 Two Piece Stainless Steel Racing Header with a 2.5” outlet
High quality T201 Stainless Steel Pipe with CNC Machine Flanges Made
Bolts directly to engine heads.
201 Stainless Steel in 18 gauge thickness
1-piece design for easy installation
Tri-Y Step design
Excellent Ground Clearance
Gaskets included
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Application:
For Honda / Acura B Series (B16, B18, B20) Engines
For Acura Integra (1990-1993) - LS 1.8L L4 FI GAS | B18A1 | DOHC
For Acura Integra (1990-1993) - GS 1.8L L4 FI GAS | B18A1 | DOHC
For Acura Integra (1990-1993) - RS 1.8L L4 FI GAS | B18A1 | DOHC
For Acura Integra (1994-2001) - LS 1.8L L4 FI GAS | B18B1 | DOHC
For Acura Integra (1994-2001) - GS-R 1.8L L4 FI GAS | B18C1 | DOHC
For Acura Integra (1994-1998) - RS 1.8L L4 FI GAS | B18B1 | DOHC
For Acura Integra (1995-1996) - Special Edition 1.8L L4 FI GAS | B18B1 | DOHC
For Acura Integra (1997-2001) - Type R 1.8L L4 FI GAS | B18C5 | DOHC
For Acura Integra (1997-2001) - GS 1.8L L4 FI GAS | B18B1 | DOHC
For Honda Civic (1999-2000) - Si 1.6L L4 FI GAS | B16A2 | DOHC
For Honda Civic del Sol (1994-1995) - VTEC 1.6L L4 FI GAS | B16A3 | DOHC
For Honda Civic del Sol (1996-1997) - VTEC 1.6L L4 FI GAS | B16A2 | DOHC
For Honda CR-V (1997-1998) - EX 2.0L L4 FI GAS | B20B4 | DOHC
For Honda CR-V (1998) - LX 2.0L L4 FI GAS | B20B4 | DOHC
For Honda CR-V (1999-2001) - EX 2.0L L4 FI GAS | B20Z2 | DOHC
For Honda CR-V (1999-2001) - LX 2.0L L4 FI GAS | B20Z2 | DOHC
For Honda CR-V (2000-2001) - SE 2.0L L4 FI GAS | B20Z2 | DOHC