603 Performance and Maintenance of Londonderry LLC

01/28/2026

🚨BREAKING NEWS🚨 Vehicle inspections in New Hampshire will continue for now after a federal judge issued a preliminary injunction preventing a law that would halt inspections from taking effect.

BREAKING NEWS: Vehicle inspections in New Hampshire will continue for now after a federal judge issued a preliminary injunction preventing a law that would halt inspections from taking effect: https://www.wmur.com/article/injunction-new-hampshire-vehicle-emissions-tests/70173940

10/31/2025

The Laflamme Family Truckster is ready for Halloween after a few last minute repairs.

04/25/2025

Dan's 22 Challenger came in for a whipple supercharger, HP tuners unlock and a tune. 50% power increase over stock, certified ripper.

04/16/2025

Another built STI done, broken in and out the door. Good driver but still hauls the mail.

603 longblock w/gsc valvetrain and s2 cams
Ets FMIC
Id1050s
FP Blue

03/08/2025

Ncis longblock got this Sti back on the road.

03/08/2025

Somehow forgot to post this nice unit. Custom spec Work wheels, r888s, suspension adjust and a Few house keeping items.

03/08/2025

Little drop with rear bags on Devon's Denali.

01/23/2025

Engines and clutch jobs are the only things we do around here lately.

01/21/2025

We can always count on to test out his modifications.

12/04/2024

Big rig service today.

04/18/2024

Last week we had Pat's Tacoma for a variety of lights, hooke road bumpers and cali raised roof rac. We wired to a sleek switch panel as well as using factory fog and reverse switches.

02/14/2024

Jimmy's Jeep got considerably shorter with this Moto Bilt bobbed aluminum bed. Started with 18in off the frame. Then we color matched and raptor bedlined the bed in house. Along with Powder Coated brackets and accessories and a set of KC Rocklights.