BLOX Racing engine block guards help strengthen and support the upper cylinders walls in open-deck Honda/Acura engines. CNC-machined from AL6061, the BLOX Racing engine block guard also provides maximum coolant passage to the head minimizing the risk of head gasket failure and cracked cylinder sleeves. BLOX Racing billet block guards are necessary for forced-induction engine applications.  Made in the USA. Vehicle & Engine Applications 93-96 Prelude Si VTEC (H22A1) & JDM Variant (H22A) 97-01 Prelude VTEC Base & Type-S (H22A4) JDM H23A VTEC JDM H22A/A7 Euro Accord Type-R JDM H22A Prelude Type-S / S-Type JDM F20B VTEC Accord SiR  

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