Official 2.4L Performance Modification List
 

Special thanks to PenguinPIE and all the CSS.net members that helped, and the original thread found here, for a majority of the information. :twothumbs

Intake: The stock air box is highly restrictive. Freeing this up would provide more air for combustion and increase power output

• Cold Air Intake
  • Injen >>
  • AEM
  • Rebel Autoworks (RAW)
  • Advanced JDM >>
• Short Ram Intake
  • K&N Typhoon 2.4 specific >>
  • GM Performance Parts >>
  • AEM
  • Z-spec/RSM Racing >>
  • Weapon R >>
  • Air box mod INFO
• Intake Manifold
  • Hahn Racecraft INFO
  • Vulcan Turbo >>
  • Kinsler Fuel Injection (optional upper rail kit) >>

Exhaust: The less restrictive an exhaust setup is, the more power will free up from an engine. Our 2.4 stock exhaust system is decent (has 2.5" piping), but it is restricted by the header, cat (in the downpipe), and the exhaust section from rear wheel back (which becomes 2.25" piping and has a restrictive muffler)

• Header (Exhaust manifold)
  • Long Tube (high-end gain)
    • Weapon R Race Header (with downpipe, no cat)
  • Mid-length (mid gain)
    • ZZP Midlength Combo (with downpipe, optional cat) >>
    • SLP Combo (with downpipe, cat)
    • Vibrant Header Combo (with downpipe, cat)
    • OBX
    • Pacesetter Header
    • Clear Image Automotive Header >>
    • CTI Race header (optional cat) >>
  • Shorty (low-end gain)
    • CA Header V1 (not produced anymore)
    • CA Header V2
    • Shiny-Hiney (identical to CA V1) >>
    • DC Header
    • Hahn Racecraft
    • GM Performance Parts
    • Stock Extruded and Honed
    • BADMAB Industries >>
    • ZZP Header
  • Turbo (for turbo applications only)
    • Vulcan Turbo Downward Manifold
    • Vulcan Turbo Equal Length Manifold
• Downpipe
  • XTC Downpipe (optional cat, 2.5" or 3")
  • ZZP Downpipe (optional cat, 2.5" or 3")
  • Stock LSJ Downpipe w/ cat INFO (requires some modification for the Auto Trans.)
  • Clear Image Automotive Downpipe (optional cat) >>
  • CTI 3" downpipe (optional cat) >>
• Catback
  • GM Performance Parts (Performance/Touring)
    Videoclip
  • Corsa (Sport/Touring)
    Videoclip
  • Magnaflow (either 2.25" or 2.5")
    Videoclip
  • Megan Racing PIC
  • SLP Loudmouth II
    Videoclip
  • SLP Loudmouth II Dual Outlet
    Videoclip
  • Pacesetter
    Videoclip
  • Ark Racing N2 (not produced anymore)
    Videoclip
  • Ark Racing DT-S
    Videoclip
  • Ark Racing GRIP INFO
    Videoclip
  • Tusdo N1 Videoclip
  • Borla
    Videoclip
  • Hahn Racecraft 3" >>
    Videoclip
  • Clear Image Automotive (either 2.5" or 3") >>
  • Stainless Works >>
  • CTI 3" Videoclip
  • ZZP 3" >>
  • Custom piping >>

Engine: (requires tuning)

• Forced Induction
  • LSJ Supercharger Kit swap INFO
  • Hahn Turbo Kit
  • ZZ Performance Turbo Kit INFO
  • ZZ Performance Supercharger Kit >>
  • Speed Mafia Procharger Kit (currently only available for Ion) PIC
  • Custom turbo kit INFO
• Camshaft
  • Custom regrind
• Nitrous
  • NOS
  • Nitrous Express
  • Zex
  • Holly
  • Vemon
  • DynoTune
• Throttle Body
  • Throttle Body port/swap
  • Individual Throttle Body kits
  • ZZ Performance Throttlebody adapter plate >>
• Injectors
  • LSJ Injectors, or Stage 2 Injectors
  • #33 Injectors >>
  • #39 Injectors >>
  • Siemens #60 Injectors >>
  • Cobalt-Addiction #80 Injectors
• Cylinder Heads
  • Custom port and polish INFO
• Pistons
  • Wiseco
• Connecting Rods
  • Flatlander Racing
  • Pauter
  • CARRILLO H-Beam >>
  • CARRILLO Super A-Beam >>
• Electrical
  • Jet Performance Chip MAF sensor
• Crate Engines

Pulley

• [*]

Transmission:

• Manual
  • Short Throw Shift kits
    • TWM Short Shift Kit
    • B&M Short Throw Shifter
    • Ark Performance
    • Any STS kit for the Getrag Transmission in some 2.4L and all Ecotec equipped Cavaliers will fit the 2.4L manual transmission INFO (Some may require slight modification to fit properly)
  • Clutch Kits
    • Exedy Racing
    • SPEC
    • Competition Clutch
  • Flywheels
    • Fidanza
    • SPEC
    • ACT
  • LSD (Limited Slip Differential)
    • Quaife
  • Miscellaneous
    • ZZP master cylinder clutch rod >>
    • N2MB Racing WOT Box INFO
• Automatic
  • B&M Shift Plus INFO (for late 06+, wiring is a bit different)
  • Transmission Tune
  • LSD (Limited Slip Differential)
    • Quaife

Tuning: Our stock engine tune is rather conservative. Tuning parameters like power enrichment delay, air to fuel ratio, and spark timing will result in decent horsepower gains. Tuning after installing bolt ons (intake and exhaust) will further bring out the potentials of those modifications

• Tuning Equipment INFO
  • Hptuners >> (doesn't support 2008 ECM yet)
  • EFI Live >> (doesn't support 2008 ECM yet)
  • LS2-Edit >>
  • Trifecta Performance Tuning INFO
  • AEM F/IC >>
• Canned Tune
  • Vector Motorsport >>
  • Jet Performance Chip INFO
  • Westers >>
    

Legend:
>>= Link to product
Videoclip= video
PIC= Picture
INFO= Additional information on product

OK I think I got everything that wasn't added from the last thread. If you see something missing or a link that doesn't work just post it up and I'll add it. Also if you have a video clip or picture of your exhaust that isn't already up please post the link and I'll add it.

Sub'd

Everything on CTIs website says N/A. Are they not producing parts atm?

Also, JBP doesn't sell outside of its dealer network, which based on the links on their site, no company seems to carry their products. I searched through the dealer links and not a single one has JBP cams (or anything that I could find).

hmm... apparently the lsj DP is a 3" not a 2.5... took my car to get exhaust and cat put on and he showed me how it's a 3" not a 2.5 and that the cat is not going to fit... might wanna add that to the list that it's not a 2.5 like once thought

You may have to call CTI to order it.

which is the best exhaust for me if i only have a CAI and will get it tuned after i put on the exhaust

If you like loud, Megan Racing is nice, but youtube vids to see what u like.

New to modding a car. What would be the best to choose from to replace the stock air intake? The Cold air intake, Short ram intake or intake manifold?

Thanks!

The stock manifold is fine for bolt ons. As for the intake its a matter of personal preference because the SRI and CAI make just about the same amount of power.

Thanks for the response.

Quick question, what would be an example of that personal preference between SRI & CAI?

You can hear the air being sucked in with the SRI not sure about the cold air though. I'm sure if you asked a member with one they could tell you.

I'm probably going with a SRI then. Living in FL where downpours come down anytime and the roads get a little flooded I don't think the CAI would be the best option.

Thanks for your help

Does the alternator pulley actually free up horsepower or is a just another thing to buy?

I don't know about the altanator pulley but the underdrive pulley does. Do a search I'm know there are a few threads on the topic floating around.

ZZP offers a canned tune for the 2.4's

whats the best length header for basically daily driving.... i was thinking mid length?

I installed a Weapon-R short ram intake on my car and my CEL came on. I took it to a shop and he told me that im running rich. Im a little confused about how i install something that brings in more air but im not getting enough air. Any help?????

You may have to tune the car to adjust the ratio. Or perhaps something is wrong with your MAF sensor.

I like the SLP.. anyone know a shop that has free or cheap shipping??

What about the throttle body as an option for intake? porting/lsj swap? zzperformance has a kit

Anything about suspension, braking, stainless lines, etc?

wow cool thread and great work and organization!

Those items are swappable between all the trims. This is from go fast mods. lol

Thank-you

looking for .cfg files to tune 12 Malibu 2.4

Why would anyone put a 2.25 magnaflow on our 2.4L?