Welcome to throttlebodys.com

Custom Throttle Body Machining

Excellence through Quality, Service and Convenience


Now Offering 4.0L Jeep Throttle Body Machining










Professional throttle body machining service for the following make & models.

1986-87 Buick GN

Hotair GN

1st Gen Neon

Neon SRT-4


Fiero 2.8

Jeep 4.0L

PT Cruiser

EVO 8 - 9



Want to add some CFMs to your motor ? It's generally accepted for most cars that a CFM increase of 10% will result in a gain of between 5 and 15 HP. Results will vary for each car and combo but one constant is that the improved throttle response will increase your grin factor by 100%

On those throttle bodys having shaft seals, new replacements will often cure drivability problems. plus, by curing boost leaks at the shaft, a significant improvement in turbo efficiency can result in a gain of 10 HP or more.

A bored throttle body is a simple install. Usually 30 minutes or less. most cars sensors reset automatically so you may not even need a scan tool for the installation. To get the full benefit of the new TB you may need to port the intake to match but an injector upgrade won't be needed. Your cars MAF sensor will compensate for the additional CFMs from the larger bore throttle body. 

About me

Former Vice Director, Newsletter Editor and Webmaster of one of Oklahoma's largest car clubs with a membership of over 150. I'm also the owner of a 1986 Buick Grand National and I just recently sold my 1989 Pontiac Turbo Trans Am which was the 10th built of 1550. 

My Ebay Feedback HERE

Besides my interests in Turbo Buicks I also designed the simple, reliable and inexpensive DIY ALKY INJECTION SYSTEM The DIY Alky Kit is the forerunner of many of the current alcohol injection systems being marketed today.

When I retired from my USAF machinist job I decided to expand my hobby of machining throttle bodys for Buick GNs to include other car makes. So, with close to 50 years of machining background and 18 years experience machining & rebuilding throttle bodys, I believe I'm able to offer the  experience and skill required for your throttle body service. 

Feel free to contact me at stevemonroe@cox.net if I can be of service

Revised DSM ISC Sensors

Now in Stock

$65 Shpd (US only)

1 yr Guarantee




Email to: stevemonroe@cox.net


God dwells in details. Power bursts forth from precision


Anti Spam 


shopify stats