Edelbrock heat exchanger part #15406 is a single pass/two row design and delivers 22,000 btu/hr Includes a 3/4in. barbed inlet and outlet for plumbing, along with M6x1.0 threaded bungs for mounting. Heat exchanger part #15406 is a Single Pass/Two Row Universal Heat Exchanger with the following dimensions (26.5in. W x 5in. H x 2.62in. D) and 6 threaded bungs. Edelbrock offers a wide selection of Universal Heat Exchangers to work with the Edelbrock Universal or Enforcer Supercharger systems. Edelbrock heat exchangers offer reliability and durable construction for high Performance's street applications.