L98 Headers & Mandrel Exhuast
02-16-2003, 11:40 PM
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L98 Headers & Mandrel Exhuast
Just updating ya'll about my 89 L98 exhuast project. I put on some Hedman headers #68440 the other week.....GREAT! I got some 2.5" reducers VS the 2.25" ones the headers came with. I am almost done making my own mandrel bent exhuast. I have a welder...so.. I bought a O2 bung, drilled the Drivers header itself in the collector and welded that bad boy in...and using 45degree mandrel bends welded up a very, i mean very nice nice exhuast. The exhuast is almost tucked so i have great ground clearance and i have NO 90Degree bends. I used all 45's. 8- 45 degree bends at $20each though!!!! and 10Ft of Almized steel 2.5" exhuat pipe and at the end some 40Series FLOWmaster mufflers and some 3" chrome tips. all i can say is factory manifolds can Suck my Dizick. I also made my own H pipe. If i took this to an exhuast shop to just have an exhuast put on from the headers back would be $600+. all i can say is i love NAPA for carrying Mandrel bends!!!! I'll have pics soon.
02-17-2003, 04:30 PM
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Re: L98 Headers & Mandrel Exhuast (65Z01)
no, NO CATS. just full length headers, 2.5"reducers and mandrel bends... h pipe and flowmasters. i have a ported out factory air box, KN filter, cut the lid open, TB bypass, TPS enhancer, NGK copper plugs, MSD 6AL with MSD super conductor wires, MSD coil, brass HEI cap/rotor set up, Accel Ignition module, 160degree thermostat, fan overide switch, removed frisbee, custom chip by jesse Azzato in PA, ported Plenum, stg 2 BM shift kit, ZR1 rims, Lowered 2", tinted windows, Kenwood CD Player, Audiobahn 10" dual voice coil sub in the passenger compartment w/300W amp hidden, Pioneer 6x9's and 4x6's, Racing seats and belts, and a harness bar, fog light upgrade and Headlight upgrade to H3 encasement(diamond). I dynod 413.4Ft/lbs of torque. :) oh yea...forgot the 24lb injectors, and AFPR.
02-17-2003, 06:25 PM
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Re: L98 Headers & Mandrel Exhuast (Fast_vette89)
Yes, please show some pics. Can you feel any loss in torque?I didn't even know NAPA had those mandrel bends. :cheers:
02-17-2003, 07:34 PM
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Re: L98 Headers & Mandrel Exhuast (1STVETTE90)
I don't think all NAPA's have them. I live in tampa and the one down the street is the Hub or warehouse one....MASSIVE. It's like a ToysRus for motorheads. Not even the performance shops carried the bends in stock....but napa did. I'll have pics soon. Can't tell ya if i lost torque...have'nt really driven it yet, and i need to do some tuning...and re burn the PROM. then i'll hit the dyno and see what we lost/gained. i expect a 35RWHP gain, and same torque. b/c the TPI motor gets it's torque from the runners....not the exhuast. i'll probly see 320RWHP/400Ft/lbs. i'll get pics and the pics of the dyno things up here soon... Q-How do we post pics on here????
