TH350 Torque Converters
The Turbo 350 (TH350) is a compact, lightweight three-speed automatic that powered a generation of classic GM muscle. It remains a popular choice for small-block street cars, restomods and bracket racers.
Matching the right torque converter to a TH350 improves:
- Off-the-line response
- Street drivability
- Bracket-racing consistency
- Small-block performance
Boss Hog Torque Converters builds TH350 converters for classic muscle, street performance and street/strip small-block combinations, matched to your exact setup.
Common Applications
Choosing Your Stall Speed
1,800–2,400 RPM
Best for
Stock and mild street small-block builds
2,400–3,000 RPM
Best for
Street performance and cammed small-blocks
3,000–3,800 RPM
Best for
Street/strip and bracket racing combinations
3,800+ RPM
Best for
Aggressive, race-oriented builds
Frequently Asked Questions
What's the difference between a TH350 and TH400 converter?
The two transmissions use different converters: a TH350 is a lighter-duty unit common in small-block street cars, while the TH400 is built for higher horsepower. Always match the converter to your exact transmission.
Is the TH350 good for a street/strip car?
Yes, with the right stall speed, the TH350 is a great street/strip transmission for small-block combinations.
Recommended Series
Night Stalker
Street-friendly performance for daily-driven and mildly-modified builds.
Shop the series →Street Bandit
Street & strip converters for cammed engines and weekend racing.
Shop the series →Out Law
Maximum-effort converters for turbo, nitrous and dedicated race combos.
Shop the series →Need help choosing a TH350 converter?
Use our Converter Finder or talk with a Boss Hog specialist to get matched to your exact combination.
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