Page 7 of Intake Manifolds by Holley Performance Products, Inc.

looking for the ultimate in high performance street intakes a lot has changed in the performance world since many of the manifolds on the market today were introduced 20 years ago typical engines used to be 283 to 327 cubic inches not so anymore with the popularity of larger stroker engines and more efficient cylinder head/cam designs has come a need for manifolds to support these larger displacements weiand recognized this and has developed a new line of action plustm manifolds designed with computational fluid dynamics cfd to generate maximum horsepower and torque out of today s engines don t believe it check out the dyno chart to see what you re missing under your hood want to compare us to the competition when you see the power quality and value pricing of weiand manifolds it won t be a tough choice completely new designs optimized for today s bigger engines industry leading computational fluid dynamics cfd airflow design software utilized for optimized air/fuel distribution and power dyno testing of the new weiand® 8121 found an additional 25 peak hp and 23 lb/ft torque over brand e p/n 2116 testing on gm l31 short block gm l31 vortec heads modified to int/exh handle high lift 32º timing cam 212/218 dur int/exh .050 .495 502 int/exh lift 650 cfm carb 1-5/8 headers intake manifolds testing on gm l31 short block gm l31 vortec heads modified to handle high lift 32º timing cam 212/218 dur .050 .495 502 int/exh lift 650 cfm carb 1-5/8 headers features/benefits · low rise/dual plane design builds maximum torque for street performance engines · permanent mold casting process for lighter smoother better looking and more consistent castings · available in satin polished and everbrighttm coated · available for gm vortec and standard small block chevy heads · dyno proven to make as much as 25hp over the leading competitor · fully cnc machined for a perfect fit · square bore carburetor flange · exhaust crossover for improved street drivability standard small block chevy heads recommended accessories · holley street avenger carb series in 570 or 670 cfm · universal carburetor installation kit p/n 20-124 installation notes utilizes late model alternator and a/c bracket mounting provisions has additional vacuum tap off of runner will clear hei distributors recommended fel-pro gasket number 1256 specifications · power band idle to 5500rpm · overall height frt 3.50 rr 4.50 · weight is 14 lbs · 8120 port size 1.84 height 1.12 width · 8121 port size 2.00 height 1.06 width application 1957-86 262-400 sb chevy v8 1987-later w alum heads 262-400 sb using 1996 later gm vortec l31 iron heads satin 8120 c polished 8120p c 8121p c everbright tm 8120c c 8121c c new 8121c c not legal for street use with a 4-barrel in california on vehicles equipped with a 2-barrel carburetor for which there was no 4-barrel option or see page 4 for symbol explanation tech line 270-781-9741 11

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