Will it hurt my performancce if I put the Super Ram runners and plenum on a stock L98?I only have Slp catback,hypertech chip,160 degree thermostat,K&N filters,gutted airbox,Super Ram manifold base,52mm throttle body.

 

With those mods your engine isnt stock!!

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88 GTA
L98 350
700R4
3:27 axle
MODS,
Edelbrock TES headers, 2.5" straight pipe, Flowmaster 80 series, K&N filter, Accel 8.8mm wires, Bosch Platinum plugs, Wells cap and rotor button, Wells ignition module, MAF screens removed, Hypertech TB air foil, Thermomaster stage II chip, 180* Powerstat, Hypertech cool fan switch, B&M shift kit, B&M power clutch pack, B&M servo, GM fuel filter.

 

I consider an engine stock until the cam head and cam is changed. With the super ram it may be too much air for your application.

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89 FORMULA 350 Edelbrock Cat-Back ,March Pulleys,Super Coil,MSD 6AL ,Edelbrock TES's, AFPR ,Shiftkit, Edelbrock Base ,AS&M Runners, Edelbrock Waterpump, ,Crane Gold 1.6 RR's, BBK 52mm TB , MSD 22# Injectors ,Hoping for 13.5