Dynojet Thunderslide Kit - Stage 1 `99 Twin CAM 88 — Harley-Davidson Road King, Road King Classic, Electra Glide (1999)

Dynojet Thunderslide Kit Stage 1 is a custom carburetor slide designed for 1999 Harley Twin Cam 88 engines, engineered to improve fuel atomization and throttle response. The precision-machined slide provides stronger signal control that delivers measurable power gains and better fuel economy.

Features

• Custom-machined carburetor slide
• Improved fuel atomization and throttle response
• Enhanced power and fuel economy
• Precise slide movement control

Specifications

• Brand: Dynojet
• Manufacturer Part #: 8130
• Length: 3.75 in
• Width: 7.9 in
• Height: 1.5 in
• Weight: 0.36 lbs

Fitment

Fits 1999 Harley-Davidson Twin Cam 88 carbureted models. Not legal for sale or installation in California — verify local emissions regulations before purchase.

Frequently Asked Questions

Will this fit my 1999 Twin Cam 88?

Yes — this Stage 1 kit is designed specifically for 1999 Harley Twin Cam 88 carbureted engines.

Is this legal to install?

Not legal in California. Check your state and local emissions laws before installing — some regions have restrictions on carburetor modifications.

Will I see a power increase with just this slide?

Yes. The improved fuel atomization and slide signal control deliver noticeable gains in throttle response and low-end power.

Do I need to rejet my carb?

The Thunderslide works with your existing jetting, though some riders choose to rejet for optimal performance based on their setup.