Buying a modified GT

Obi-Wan-YJ

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I'm shopping for a new-to-us Mustang. We're currently looking at a 2007 GT that has a few engine mods, and I'm wondering whether the mods are more trouble than they're worth, or whether we should go ahead with the purchase.

This car will be my 19-yr-old son's daily driver. I trust him not to be stupid with it, although he may get some speeding tickets. He's upgrading from a 2002 Subaru Forester that his grandmother handed down 4 years ago. He's just now learning to drive a stick, but I think he'll be OK.

The ad for the car in question is https://www.facebook.com/marketplace/item/1673646717218165

"Not in a rush to sell it at all just don't drive it as much as I thought I would. It is a 5 speed manual. Parts List: 2018 mustang wheels, Lowering Coilers, Comp Cams Mutha Thumpa, Cold Air intake, H pipe and mbrp axle backs no cats. Duckbill spoiler, Carbon Decklid, Fiberglass Hood, and its professionally tune by Lito."

The car is currently owned by a college kid who's had it just 8 months and has too many other vehicles to keep it. The mods were reportedly all done by the previous owner just in the last couple years. That owner had it for about 7 years. We're trying to get detailed records on the mods. The cam, phasers, coils, and plugs are all newer. I has a new throwout bearing, and the mechanic said the current aftermarket clutch had about 60K left on it. The clutch felt good when driving. No audible noise indicating worn timing guides. The car has 180K miles on it. With these mods, it needs 91 octane gas. The suspension sits too low and scrapes speed bumps, but it's adjustable and can be returned near stock height.

We drove it tonight, and it was surprisingly streetable. No real torque below 3000 rpm, as expected from the big cam. The exhaust is really loud needs to be replaced with some real mufflers. The Lito tune is specific to the removed cats, so we probably won't change that. The body's in decent shape, although the unpainted fiberglass hood looks tacky.

You're probably asking, "if you don't like the torque curve and noise, why are you considering this car?" I ask myself that same question. The answer is that sports cars in our price range with manual transmissions that haven't been beat to hell are hard to come by around Lincoln, Nebraska. A Mustang is already his second choice. I'd like to test drive a 2011+ V6, but we can't find one within reasonable driving distance.

We can probably get this car for $7500 or maybe $7000, and it needs new tires right away and new mufflers soon, so that's $8500-9000.

Should I be worried about a car with this mileage and these mods, or should I be happy that all the common pain points have been addressed recently?

mustang.jpg
 

Dino Dino Bambino

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The mileage itself wouldn't worry me 'cause these engines will run reliably for over 300k miles with proper maintenance.
Your test drive doesn't seem.to have raised any red flags but I strongly recommend you take the car to a professional shop and have it inspected underneath. You may find other items (suspension, steering, brakes, oil leaks) that require attention, and you can use those as bargaining tools to knock the asking price down.
 

Obi-Wan-YJ

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You may find other items (suspension, steering, brakes, oil leaks) that require attention, and you can use those as bargaining tools to knock the asking price down.
If no new problems are discovered, do you think $7500 is fair? What's your opinion on using a big cam with 91 octane for a kid's daily driver?
 

Squirrely

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Obi-Wan-YJ, Dino Dino gives sound advice. How he fits all this information in his head is beyond me. I bought a 2007 GT automatic w/75,000 miles on it for $11,500. Cai, 3:73 Detroit Locker, BBK long tube headers, catless, X pipe, resonators and last but not least American Thunder mufflers.The work and tune done by Lidio.
I am extremely happy and impressed with the performance and best part it’s turn key!
Oh, and stock cam W/93 oct tune.
Hope this helps.

IMG_3774.jpeg
 

Dino Dino Bambino

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If no new problems are discovered, do you think $7500 is fair? What's your opinion on using a big cam with 91 octane for a kid's daily driver?
The car needs new tires and mufflers so knock the seller down to $7000.
Check other consumables like brake pads/rotors, shocks/struts, ball joints, tie rod ends, and suspension bushings 'cause these will further eat into your budget if any need replacing.
The Mutha Thumpr cams will make the engine feel soft below 3000rpm even with Lito's tuning magic, and the car will feel VERY sluggish in 5th gear since the stock 3.31 axle gears are ridiculously tall. Plan on doing a 3.73 ratio axle gear swap (maybe even a 4.10) if you want this car to perform the way it should. You might even see an improvement in highway fuel mileage since you'll need less throttle opening to gain any meaningful acceleration in 5th, and you won't need to drop down to 4th every time you want to overtake or scale an incline.
 

asdrew

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If no new problems are discovered, do you think $7500 is fair? What's your opinion on using a big cam with 91 octane for a kid's daily driver?
The price seems fair to me, but i agree on using the tire cost as a bargaining tool, more so than the mufflers since that is really a matter of preference rather than safety. Asking for $500 off lets the seller effectively split the cost of new tires with you, which is resonable.

You say you trust your son not to be stupid with it, so the big cam and fuel cost should be okay. He'll learn real "fast" that getting on it regularly wll increase the consumption dramtically, lol. Maybe encourage him to keep MPG logs. Decades ago I came to the realization that if one wants to fret about gas costs, their vehicle choices would need to be much more mundane than mine and I have NO intentions of trading anything for a prius.

And I totally agree with Dino on the gears. I can't wait to swap my 3.73 axle into the GT I bought with a 3.31 rear end. It made a huge difference in responsiveness in the V6 it is in, which in the process of being returned to stock.
 

Juice

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Modified car for a teenager ... What could possibly go wrong?
It has been run hard, you can bet on that.
Gas prices and 15 mpg...hmm.
Internal engine work by who knows.
As is, that car is not road legal.
Price seems low considering the market now days.
Enough red flags?
 

bigmace

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I would not buy this car for your sons daily driver. Plenty of other unmolested mustangs available for this price.
 
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StockishS197

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I wouldn’t buy any modified car from a college kid, tbh.

Also, I bought my first S197 while I was in college and I was plenty stupid and got lucky a number of times, despite being a responsible kid at the time.

I would look for a stock, clean example and if anything, then you and your son can modify it.
 

Obi-Wan-YJ

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The Mutha Thumpr cams will make the engine feel soft below 3000rpm even with Lito's tuning magic, and the car will feel VERY sluggish in 5th gear since the stock 3.31 axle gears are ridiculously tall. Plan on doing a 3.73 ratio axle gear swap (maybe even a 4.10) if you want this car to perform the way it should. You might even see an improvement in highway fuel mileage since you'll need less throttle opening to gain any meaningful acceleration in 5th, and you won't need to drop down to 4th every time you want to overtake or scale an incline.
"Soft below 3000rpm" is an understatement. Out on a flat highway at 65 mph (around 2000 rpm), 5th gear would not accelerate at all. Leaving a stop light was very sluggish. I'm trying to convince my son that he'd enjoy the car more if he had a stock cam that was fun to drive in town, which is where he'll do almost all his driving.

How do you tell that it has 3.31 gears? What does a professional gear swap cost these days? I did a gear swap myself in my underpowered 1995 Jeep many moons ago--would this Mustang be significantly harder to DIY?

I would not buy this car for your sons daily driver. Plenty of other unmolested mustangs available for this price.
Sadly, there are not plenty of unmolested manual-transmission mustangs around here at any price. I would really love to find him a stock 2011 V6 manual, but those simply don't exist within 100 miles of us, and we can't spend an entire day road tripping to see a car that we might not buy.
 

JC SSP

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Hmm... 2002 Subaru Forester and a quantum leap to a modified 2007 Mustang GT 5spd!

Carfax, independent auto inspection and keep looking in the meantime into other options.
 

Midlife Crises

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Regardless of price, the vehicle is not highway legal. It will need an exhaust system with cats, a new tune and tires right off the bat. Mutha Thumpers are underivable at low speeds and buck like a bronc at parking lot speed so you have to slip the clutch to roll within jerking. Detroit Rockers and even Ford Hotrods are much more user friendly cam choices.
Think about how the car will be driven. This might not be the best choice for a step up from a Subaru.
 

JC SSP

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His info states Nebraska… no emission control, so not sure what would make it not street legal?

I agree that there might be better car options out there.
 

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