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Discussion Starter · #1 ·
Please use this space for any recommended mods for the Solstice base, GXP, sky base or redline models, we all want to get the most out of these sexy beasts and anything you can think of that'll make them any sexier than they already are is greatly appreciated. Answer at least these two things:
- What is your favorite mod and why?
- What is the coolest or best mod to a one of our roadsters you've ever seen?


Seriously any and all comments are appreciated and encouraged. Super expensive, large mods or cheap but satisfying small mods, if we can I'd love to make this thread a collection of years of experience for all new or old owners to enjoy. Plus it would be really weird if I hyped up this thread for there to only be like 3 replies. So make sure your mother, father, aunt and twice removed step cousin to comment their recommendations so we can maximize potential mod ideas. Thanks in advance!
 

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Welcome to the forum... hell of a first post, but I'm game. Biggest bang for the buck - a good tune for the GXP!
P.S. - Close second is the DDM brace bundle and good tires. :cool:
 

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What is your favorite mod and why?
Probable my split spoke wheels (Q9Y) and adjustable BC coilovers. The split spoke wheels were standard on the 2009 Street Edition models and the split spokes make the wheel look larger than the standard five spoke factory wheel. There were also installed on the pre production 2010 Heritage Edition models, and it was rumored that they would be optional on the 2010 models. But when Pontiac closed it doors a vendor bought the factory split spoke wheels stock and began selling them on Ebay. Several of us bought sets of them that way. Now I went with BC coilovers because they allow you to adjust your ride heigh & rebound, whether if be for looks or performance (or both).
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What is the coolest or best mod to a one of our roadsters you've ever seen?
Smoothline hardtop because it give the Kappa an aggressive appearance. The hardtop was first shown at the 2005 SEMA annual event, and was called the Weekend Club Racer concept. It was made of carbon fiber and developed for SCCA racing events. It was not street legal and you had to have a SCCA license in order to buy it from your local GM dealership parts department. A few of them have popped up for sale on the forum through the years, but they have no weatherstripping, headliner, or mounting kit. Several years later a company called Smoothline began offering the same top but in fiberglass and developed it for street use (optional heated rear window, extra thick headliner, etc.). Still does, but customer service reviews tend to be negative. Edit to add that SL offers two different hardtops, the Club Racer and the Le Mans version. The Club Racer hardtop is Sol/Sky specific due to the Sky having pointed humps and the Sol have hounded humps. The Le Mans's hardtop is a fastback style and will fit on both cars because it extends almost to the ends of the humps.
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Discussion Starter · #4 ·
Welcome to the forum... hell of a first post, but I'm game. Biggest bang for the buck - a good tune for the GXP!
P.S. - Close second is the DDM brace bundle and good tires. :cool:
I would actually love to get a good tune up for my car I've actually been wanting to do it for a while now, problem is I have no idea how to even go about that.
 

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Discussion Starter · #5 ·
What is your favorite mod and why?
Probable my split spoke wheels and adjustable BC coilovers. The split spoke wheels were standard on the 2009 Street Edition models and the split spokes make the wheel look larger than the standard five spoke factory wheel. There were also installed on the pre production 2010 Heritage Edition models, and it was rumored that they would be optional on the 2010 models. But when Pontiac closed it doors a vendor bought the factory split spoke wheels stock and began selling them on Ebay. Several of us bought sets of them that way. Now I went with BC coilovers because they allow you to adjust your ride height whether if be for looks or performance (or both).
View attachment 117032

What is the coolest or best mod to a one of our roadsters you've ever seen?
Smoothline hardtop because it give the Kappa an aggressive appearance. The hardtop was first shown at 2005 SEMA and called the Weekend Club Racer concept. It was made of carbon fiber and developed for SCCA events. It was not street legal and you had to have a SCCA license in order to buy it from your local GM dealership parts department. A few have popped up for sale here, but they have no weatherstripping, headliner, or mounting kit. Several years later a company called Smoothline began offering the same top but in fiberglass and developed it for street use (optional heated rear window, extra thick headliner, etc.). Still does, but customer service reviews tend to be negative. Edit to add that SL offers two different hardtops, the Club Racer and the Le Mans version. The Club Racer hardtop is Sol/Sky specific due to the Sky having pointed humps and the Sol have hounded humps. The Le Mans's hardtop is a fastback style and will fit on both cars because it extends almost to the ends of the humps.
View attachment 117033
The BC Coilovers look like a super nice thing to have, I didn't even think of something like that. And I agree whole heartedly the hard top Solstices or skys look amazing, not sure why they didn't make any hard top ones as factory really. I'd love a Club Racer hardtop I find that one looks better but the logistics of switching from a soft top to a hard top frightens me.
 

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2007 Sol NA (work in progress)
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P.S. - Close second is the DDM brace bundle and good tires.
Depends on what you're going for. I agree with GG: the DDM braces do a great job of tightening up the car. If you're into HP, think "Mallett" or LS swap (same thing). I can't beat a Mallett in the quarter, but I have a tone of fun with it when I go over to the Smokies for a few days. At the end of the day, it's not about how fast, or how tight the car is - it's whether it suits YOU.
 

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If you're into HP, think "Mallett" or LS swap (same thing). I can't beat a Mallett
California doesn't like V8 Kappas... maybe I need to find a new State, but the word on the street is that the Feds are cracking down on ANY mods. :mad:
 

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I have no idea how to even go about that.
A little money... an email and a laptop with an USB/OBD 2 cable, and you're off to the races! :cool:
P.S. - there are some good sales going on this weekend
 
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Axle back Solo exhaust on my 2006 NA manual. Price was right ($400 cdn installed) and the sound is UNBELIEVABLE.

DDM short throw shifter is very nice as well for obvious reasons.
 

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2007 Sol NA (work in progress)
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California doesn't like V8 Kappas... maybe I need to find a new State,
All I can say is what I've been telling my entire family in CA: MOVE! Doesn't make any difference whether you live in SD, OC, Apple Valley, Bakersfield, Upper San Joaquin, or Red Bluff. If the traffic doesn't convince you, there are other things that should.
 

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I don't own a roadster (technically, none of you do as a having roll up windows makes them convertibles, but that is the traditional nomenclature) but I did modify my coupe to the point that I am very happy with it.

DDM brace bundle
ZOK heavier sway bars front and rear
BR Racing shocks/springs
Big wheel turbo mod
Trifecta custom tune
DDM short shifter conversion
Back up alert (not necessary for a convertible)
EBC Redstuff front pads

The ones that don't affect performance (for normal street driving) are:
Larger intercooler
DDM charge tubes
DDM powder coated cam cover
GMPP intake
Escort on board installed laser/Radar detection front and rear
Q9Y wheels and Michelin PSS tires, better front brake pads

Can't think of any left to do that I would want done.
 

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2009 Pontiac Solstice GXP Coupe 001136
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[…] I agree whole heartedly the hard top Solstices or skys look amazing, not sure why they didn't make any hard top ones as factory really. […]
Twelve-hundred-odd Solstice coupes say “Hello!”
 
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Best mod/most worth it IMO:
PAW rear suspension brace (boxes the lower mounting points) along with the DDM ProBeam - If you even think about autocrossing, you should have this (both actually).
Coolest:
You can fit 315 tires all around, but that's really for only the hardest of hardcore, but you get a boatload of grip compared to stock tires. You'll need rear fender flares and rear spacers. But it's certainly "worth it", IMO. I like my BCForged KL01 wheels a lot too, 6 pounds lighter than stock.
Cool because after seeing my car with 315, every other Kappa I see seems to be on tires way too skinny :ROFLMAO:
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2007 Solstice GXP Mysterious
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California doesn't like V8 Kappas... maybe I need to find a new State, but the word on the street is that the Feds are cracking down on ANY mods. :mad:
Right wing paranoia. The only way for the "Feds" (who, everyone here knows, don't do any kind of traffic enforcement ) to stop modding is for them to shut down the manufacturers. That won't unmod any car currently out there.
 

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Right wing paranoia.
Here in California, smog tests (which are done by plugging into the OBD2 port - long gone are the days of the tailpipe sniffer) will be checking for modifications to the car's ECM OEM software. Law enforcement, with cause, will have the power to visually check a car for modifications - said car can be 'impounded' on the spot. At the Federal level, the EPA has been pressuring aftermarket companies to stop manufacturing and selling parts that modify a vehicle's emission systems - high flow cats will soon be a thing of the past, just ask the guys at SOLO Performance.
 
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Right wing paranoia. The only way for the "Feds" (who, everyone here knows, don't do any kind of traffic enforcement ) to stop modding is for them to shut down the manufacturers. That won't unmod any car currently out there.
My car guys in Cali are getting rid of their cars that aren't before 1975. They used to get previous exemptions but now none of them will pass smog and the exemptions have tightened. Used to be 30 yrs or older were exempt but now it is only model years prior to 1975. Picked up a 1976 Firebird from Palm Springs because the owner didn't want to source and put all the smog back on. Even the guys with legally modified cars with CARB certificates and numbers are having a hell of a time getting their vehicles registered. The new OBD readers detect any tune that is not of factory origin. Non OBD cars get visual and must have all factory smog equipment with no alterations to intake and exhaust. Only equivalent oem replacement equipment is allowed.
 
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Bracing the rear mounts on the rear lower control arms. can be done for as little as $100.00 and it can be done with basic tools; hacksaw, drill, good drill bits and a measuring tape. Makes a substantial difference in how the vehicle handles in a corner.

Another is upgrading the engine cooling system by replacing all of the rubber hoses with oversized CSST (Corrugated Stainless Steel Tubing). It increases heat release from the coolant by providing more coolant surface contact to metal. Not that expensive of a modification at $400.00 ish.

I do have to say that I really enjoy the split wheel well liners I made. It keeps me from getting back aches when I have to work on the engine. I am able to put a knee on the tire . It also saves my hair a I am not pulling it out every time a tool slides off the liner and gets stuck in a place that is a real annoyance to recover it from. Now if a tool falls it falls to the ground.
 

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My car guys in Cali are getting rid of their cars that aren't before 1975. They used to get previous exemptions but now none of them will pass smog and the exemptions have tightened. Used to be 30 yrs or older were exempt but now it is only model years prior to 1975. Picked up a 1976 Firebird from Palm Springs because the owner didn't want to source and put all the smog back on. Even the guys with legally modified cars with CARB certificates and numbers are having a hell of a time getting their vehicles registered. The new OBD readers detect any tune that is not of factory origin. Non OBD cars get visual and must have all factory smog equipment with no alterations to intake and exhaust. Only equivalent oem replacement equipment is allowed.
California is not "the Feds." California's smog rules are as insane as everything in that state, and California's laws haven't mirrored Federal regulations since probably 1975.
Do yourself a favor and watch any 70's cop show, and maybe it will penetrate your head why California is the way it is.
 

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Here in California, smog tests (which are done by plugging into the OBD2 port - long gone are the days of the tailpipe sniffer) will be checking for modifications to the car's ECM OEM software. Law enforcement, with cause, will have the power to visually check a car for modifications - said car can be 'impounded' on the spot. At the Federal level, the EPA has been pressuring aftermarket companies to stop manufacturing and selling parts that modify a vehicle's emission systems - high flow cats will soon be a thing of the past, just ask the guys at SOLO Performance.
Once again, California is NOT "the Feds." The EPA can pressure anyone it wants. it has almost no enforcement power.
 
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