Can anyone suggest what next mod for the money will benefit performance for my 305? I'm trying to decide between either a Cowl Induction Hood, Powertrax Locker, or Intake Manifold.

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"91" RS, 305 tbi, 5spd, Slp Y-pipe, Random tech Cat, Flowmaster crossflow, Ultimate tbi mods, Edelbrock open element with 3" K&N, Taylor Spiro Pro wires, Redline water wetter, 180* thermostat.

 

What about headers, or gears? It might be time to get an MSD box also. If you want it to drive better I would go with some LCAs, Pan hard rod, SFC's and some poly bushing and mounts for everything.


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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

How did you get an SLP Y-pipe to connect with your stock manifolds?

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92 Camaro RS, LO3, 5-spd, T-tops

Performance:
K&N Open Air Filter, Edelbrock performer TBI intake, Fastchip Prom, Timing +4 degrees, Centerforce clutch, Xact 8mm wires, SLP 1 3/4" Headers (coated), Flowmaster Catback Exhaust, Z28 Grille w/aftmkt fog lamps, MacEwen white-face guages
Electronics:
Alpine 8030 Alarm System, Valentine One Radar Detector (How did I ever drive without one?), Pioneer DEH 7450 Head Unit w/6-pack CD changer, Pioneer DEQ 7600 Sound Processor, 2 Kenwood KAC-846 Amps powering 2 12" Pro Red subs, 2 Pioneer 6x9 and 2 MTX 4x6 speakers.
NEXT UP: TBI mods, 3.42 gears w/Torsen posi

 

SLP makes them. $200. Better to use TPI manifolds if you do that.

 

SLP makes a stainless steel y-pipe that fits to the stock exhaust manifolds. Costs $169. The down pipes are 2 1/2" going into a 3" collector all mandrel bent. I didn't want headers because I read in past posts that the engine loses torque with the headers at low rpm but makes gains from 3000 rpms and above. I like the torque down low where I mainly drive. I don't drag race my car so I'm trying to modify the engine to provide a compromise between good performance and good looks. I don't want a car with a high gear ratio that messes up the speedometer calibration or gets terrible gas mileage. I'm getting 17city/26 highway. I like the way the car performs now but I would just like to enhance it a little further.


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"91" RS, 305 tbi, 5spd, Slp Y-pipe, Random tech Cat, Flowmaster crossflow, Ultimate tbi mods, Edelbrock open element with 3" K&N, Taylor Spiro Pro wires, Redline water wetter, 180* thermostat.