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Old 08-12-2013, 07:49 AM   #1
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What external mods for L99 ?

What are some external modifications that help an L99 ?
Thanks.
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Old 08-12-2013, 08:40 AM   #2
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CAI, headers, UD pulley, TB, tune & tranny tune. You could do nitrous but, this is the extent of performance mods without cracking anything open.

If your willing to dig into other areas you can do a stall and gears and suspension work. But, if you do any of the latter mods or tune you might as well crack it all open.
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Old 08-12-2013, 08:42 AM   #3
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Camaro Now: Mods for the Masses Part I | Part II
13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
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Old 08-12-2013, 08:46 AM   #4
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Like these guys already mentioned. Long tube headers are going to make the biggest jump power wise for bolt ons and we always recommend a tune with headers. A cold air intake is another great way to make some easy power and usually every ones first mod. If you want to kill it out of the hole and hit the track you'll want a torque converter as well. We have plenty of options, feel free to give us a buzz!
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Old 08-12-2013, 02:31 PM   #5
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I have an L99 as well and was seeking more oompph/power : >)

Warning----Doing this leads to wanting more and more power : >)

I had an ADM CAI installed along with Headers, Magna flow tubes, change up in gearing and a tune. Car is NIGHT AND DAY different!!!! This cost around $3500 but was well worth it IMO.

However, as stated earlier I am now wanting MORE POWER!!!! Trust me the above is a VERY VERY noticeable difference...The car gets up and goes now. In fact here is my sheet. However now looking into Super charger to kick it up even further.

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Old 08-12-2013, 04:49 PM   #6
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Check the stickys for V8 performance upgrades. Should be a good place for you to start looking.
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Old 08-12-2013, 05:11 PM   #7
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Quote:
Originally Posted by larietrope View Post
What are some external modifications that help an L99 ?
Thanks.
CAI, scoop, ported throttle body, headers with high flow cats, and tuning would be a great start. And don't forget a catch can.
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Old 08-12-2013, 06:05 PM   #8
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Quote:
Originally Posted by larietrope View Post
What are some external modifications that help an L99 ?
Thanks.
All the suggestions listed so far will help out. Question is, what is your intended use of the car? Drag strip? Auto X?? Street fun??

That will determine the mods and also the order of importance.
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Old 08-12-2013, 09:28 PM   #9
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blower.
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Old 08-13-2013, 05:53 AM   #10
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I've been curious about an UD pulley lately. Did you guys notice good gains with it? Any adverse reactions like low voltage or anything?
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