DOU­BLE-HUMP SE­COND WIND

Chevy High Performance - - Class Of 1968 -

Trick Flow of­fers new “Dou­ble-Hump” DHC 175 head cast­ings in alu­minum for the small-block Chevy. Talk about hav­ing it all? Born out of an im­pul­sive idea from Trick Flow’s Mike Downs, he en­vi­sioned re-cre­at­ing the ul­ti­mate small-block Chevy fac­tory iron head in alu­minum. Mike said they started re­work­ing an ex­ist­ing head then de­cided to be­gin with a new cast­ing in an ef­fort to make it an even bet­ter head in A356-T61 alu­minum.

Re­tail is less than $800 per head, which is less than it would cost you to buy and re­fur­bish an ex­ist­ing set of iron Dou­ble-Humps. What’s more, you get a bet­ter head in the process with duc­tile iron valve seats, new stain­less steel valves, bet­ter flow, and petite 60cc cham­bers. Less weight. More com­pres­sion. Greater heat trans­fer. A bet­ter head.

Trick Flow an­nounces new “Dou­ble-Hump” DHC 175 head cast­ings in A356-T61 alu­minum for the small-block Chevy. The le­gendary “Dou­ble-Hump” iron head has been re­born at Trick Flow with some nice re­fine­ments that make it a bet­ter head than those dated fac­tory cast­ings.

Keep­ing with the orig­i­nal vin­tage cast­ing, these heads are avail­able with or with­out ac­ces­sory bolt holes. In­side, you get 60cc CNC-pro­filed com­bus­tion cham­bers with blended bowl ma­chin­ing un­der the valves and small cross­sec­tion in­take run­ners to pro­mote low-rpm torque in­creases and boost high-rpm horse­power.

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