IceBlue91z28

I was looking at a pair for my 91 z28 305 tpi and i want to if anyone has an opinion on them. They look good and I want to know if they add any noticable horsepower. If you have any suggestions for other runners if these suck, that would be goo to. Thanks.

Kyle F

I love them, if you port match your intake system to match them. These are really made to work with a little higher RPM cam. thats the whole Idea behind them is to make a flatter torque curve.
I cant say much as far as comparing them to stock because I replaced them, and the cam all at one time ply put in new springs and suck, following with porting everything to match. Worked out real nice for me. I would buy them again.
The long tube runners just flow more air, but are designed for the same RPM range. The tuning is more important that just net flow numbers.

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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!

PETE

iTrader: (1)

i had them and felt they were good.definately are the easiest to hog out if you cut out the divider in them you'll notice it a lot more.

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87 trans am,gm crate 350(4 bolt mains 10to1),L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,gutted airbox,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,160 fan switch&t-stat,tb bypass,accel supercoil,cap& rotor,slp 3in. catbcak,a/c delete.

SHE IS GONE BUT I KNOW THE GUY WILL GIVE HER A GOOD HOME.

best e/t:
3653lbs./full tank+ driver.
14.10@96.53mph 2.01 60'

rezinn

On a 305, I wouldn't bother. That money could be spent on a better cam, a torque converter, headers, or something more beneficial. I've got my 305 into the 13s with the stock runners and ported plenum, so I really don't think new ones are necessary.

Beast5spdGTA

amen brutha,
If they're cheap say less than $150 complete(bolts/etc.) might be worth it to help a new cam out a little. But 305s and 350s will make it to the 13s without any intake mods. I'll be there soon, that cam can't sit in my closet forever, neither can that base waiting to be ported/saimesed.

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14.62@96mph headers, muffler, chip, ghetto stuff, duct tape
89 GTA 305 TPI 5 speed 3.42 gears