Edelbrock heat exchanger part 15408 is a dual passsingle row design and delivers 55,000 btuhr Includes a 34in. barbed inlet and outlet for plumbing, along with M6x1.0 threaded bungs for mounting. Heat exchanger part is a Dual PassSingle Row Universal Heat Exchanger with the following dimensions (34in. W x 14in. H x 2.25in. D) with 4 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.